• 12588 Citations
  • 59 Scopus h-Index
1976 …2019
If you made any changes in Pure, your changes will be visible here soon.

Research Output 1987 2019

Filter
Article
2019

Carboxyl Ester Lipase May Not Mediate Lipotoxic Injury during Severe Acute Pancreatitis

Khatua, B., Trivedi, R. N., Noel, P., Patel, K., Singh, R. J., de Oliveira, C., Trivedi, S., Mishra, V., Lowe, M. & Singh, V. P., Jun 1 2019, In : American Journal of Pathology. 189, 6, p. 1226-1240 15 p.

Research output: Contribution to journalArticle

Lipase
Pancreatitis
Esters
Fat Necrosis
Wounds and Injuries

Catecholamine and Metanephrine Levels in Breast Milk before and after Paraganglioma Resection

Dodd, S. E., Singh, R. J. & Martin, Y. N., May 1 2019, In : Breastfeeding Medicine. 14, 4, p. 276-277 2 p.

Research output: Contribution to journalArticle

Metanephrine
Paraganglioma
Human Milk
Catecholamines
Pheochromocytoma
3 Citations (Scopus)

Obesity Decreases Hepatic 25-Hydroxylase Activity Causing Low Serum 25-Hydroxyvitamin D

Roizen, J. D., Long, C., Casella, A., O'Lear, L., Caplan, I., Lai, M., Sasson, I., Singh, R. J., Makowski, A. J., Simmons, R. & Levine, M. A., Jun 1 2019, In : Journal of Bone and Mineral Research. 34, 6, p. 1068-1073 6 p.

Research output: Contribution to journalArticle

Mixed Function Oxygenases
Vitamin D
Obesity
Liver
Serum
2018
5 Citations (Scopus)

10 years of 25-hydroxyvitamin-D testing by LC-MS/MS-trends in vitamin-D deficiency and sufficiency

Galior, K., Ketha, H., Grebe, S. & Singh, R. J., Jun 1 2018, In : Bone Reports. 8, p. 268-273 6 p.

Research output: Contribution to journalArticle

Vitamin D Deficiency
Vitamin D
Dihydroxycholecalciferols
25-hydroxyvitamin D
Serum
3 Citations (Scopus)

Anogenital distance is determined during early gestation in humans

Jain, V. G., Goyal, V., Chowdhary, V., Swarup, N., Singh, R. J., Singal, A. & Shekhawat, P., Jan 1 2018, In : Human Reproduction. 33, 9, p. 1619-1627 9 p.

Research output: Contribution to journalArticle

Androgens
Pregnancy
Testosterone
Parturition
Newborn Infant
2 Citations (Scopus)

Comparison of the effect of daily versus bolus dose maternal vitamin D3 supplementation on the 24,25-dihydroxyvitamin D3 to 25-hydroxyvitamin D3 ratio

Ketha, H., Thacher, T. D., Oberhelman, S. S., Fischer, P. R., Singh, R. J. & Kumar, R., May 1 2018, In : Bone. 110, p. 321-325 5 p.

Research output: Contribution to journalArticle

24,25-Dihydroxyvitamin D 3
Calcifediol
Cholecalciferol
Vitamin D
Mothers
Hyperandrogenism
Liquid chromatography
Tandem Mass Spectrometry
Liquid Chromatography
Androgens

Is There a Difference between Ultrasonographic (US) Uterine Changes of Oral Versus Transdermal (TD) 17β Estradiol (17β E2) in Girls with Turner Syndrome (TS)? Own Experience and Literature Review

Kraus, J., Unanue, N., Espinoza, A., Iniguez, G., Torres-Santiago, L., Singh, R. J., Mauras, N. & Mericq, V., Sep 1 2018, In : Pediatric endocrinology reviews : PER. 16, 1, p. 178-185 8 p.

Research output: Contribution to journalArticle

Turner Syndrome
Estradiol
Estrogen Replacement Therapy
Primary Ovarian Insufficiency
Progesterone

Limitations of platform assays to measure serum 25OHD level impact on guidelines and practice decision making

Rahme, M., Al-Shaar, L., Singh, R. J., Baddoura, R., Halaby, G., Arabi, A., Habib, R. H., Daher, R., Bassil, D., El-Ferkh, K., Hoteit, M. & El-Hajj Fuleihan, G., Dec 1 2018, In : Metabolism: Clinical and Experimental. 89, p. 1-7 7 p.

Research output: Contribution to journalArticle

Practice Guidelines
Vitamin D
Decision Making
Technology
Serum
1 Citation (Scopus)

Over-the-Counter “Adrenal Support” Supplements Contain Thyroid and Steroid-Based Adrenal Hormones

Akturk, H. K., Chindris, A. M., Hines, J. M., Singh, R. J. & Bernet, V. J., Mar 1 2018, In : Mayo Clinic Proceedings. 93, 3, p. 284-290 7 p.

Research output: Contribution to journalArticle

Tablets
Thyroid Gland
Steroids
Budesonide
Pregnenolone
142 Citations (Scopus)

Senolytics improve physical function and increase lifespan in old age

Xu, M., Pirtskhalava, T., Farr, J., Weigand, B. M., Palmer, A. K., Weivoda, M., Inman, C. L., Ogrodnik, M. B., Hachfeld, C. M., Fraser, D. G., Onken, J. L., Johnson, K. O., Verzosa, G. C., Langhi, L. G. P., Weigl, M., Giorgadze, N., LeBrasseur, N. K., Miller, J. D., Jurk, D., Singh, R. J. & 13 others, Allison, D. B., Ejima, K., Hubbard, G. B., Ikeno, Y., Cubro, H., Garovic, V. D., Hou, X., Weroha, S. J., Robbins, P. D., Niedernhofer, L. J., Khosla, S., Tchkonia, T. & Kirkland, J. L., Aug 1 2018, In : Nature Medicine. 24, 8, p. 1246-1256 11 p.

Research output: Contribution to journalArticle

Health
Tissue
Cell Aging
Quercetin
Pathology
2 Citations (Scopus)

Serum 25-hydroxyvitamin D3 levels and flares of systemic lupus erythematosus: a longitudinal cohort analysis

Mok, C. C., Bro, E. T., Ho, L. Y., Singh, R. J. & Jannetto, P. J., Jul 16 2018, (Accepted/In press) In : Clinical Rheumatology. p. 1-8 8 p.

Research output: Contribution to journalArticle

Calcifediol
Systemic Lupus Erythematosus
Cohort Studies
Serum
Vitamin D Deficiency
1 Citation (Scopus)

Serum Cortisol Levels via Radioimmunoassay vs Liquid Chromatography Mass Spectrophotometry in Healthy Control Subjects and Patients With Adrenal Incidentalomas

Huayllas, M. K. P., Netzel, B. C., Singh, R. J. & Kater, C. E., Jul 5 2018, In : Laboratory Medicine. 49, 3, p. 259-267 9 p.

Research output: Contribution to journalArticle

Spectrophotometry
Liquid chromatography
Liquid Chromatography
Radioimmunoassay
Hydrocortisone
4 Citations (Scopus)

Sex differences in NSAID-induced perturbation of human intestinal barrier function and microbiota

Edogawa, S., Peters, S. A., Jenkins, G. D., Gurunathan, S. V., Sundt, W. J., Johnson, S., Lennon, R. J., Dyer, R. B., Camilleri, M., Kashyap, P. C., Farrugia, G., Chen, J., Singh, R. J. & Grover, M., Dec 1 2018, In : FASEB Journal. 32, 12, p. 6615-6625 11 p.

Research output: Contribution to journalArticle

Microbiota
Non-Steroidal Anti-Inflammatory Agents
Indomethacin
Sex Characteristics
Permeability
2017
24 Citations (Scopus)

17α-estradiol alleviates age-related metabolic and inflammatory dysfunction in male mice without inducing feminization

Stout, M. B., Steyn, F. J., Jurczak, M. J., Camporez, J. P. G., Zhu, Y., Hawse, J. R., Jurk, D., Palmer, A. K., Xu, M., Pirtskhalava, T., Evans, G. L., De Souza Santos, R., Frank, A. P., White, T. A., Monroe, D. G., Singh, R. J., Casaclang-Verzosa, G., Miller, J. D., Clegg, D. J., LeBrasseur, N. K. & 4 others, Von Zglinicki, T., Shulman, G. I., Tchkonia, T. & Kirkland, J. L., 2017, In : Journals of Gerontology - Series A Biological Sciences and Medical Sciences. 72, 1, p. 3-15 13 p.

Research output: Contribution to journalArticle

Feminization
Intra-Abdominal Fat
Estradiol
Adiposity
Glucose
12 Citations (Scopus)

Age and Sex Normalization of Intestinal Permeability Measures for the Improved Assessment of Enteropathy in Infancy and Early Childhood: Results from the MAL-ED Study

Kosek, M. N., Lee, G. O., Guerrant, R. L., Haque, R., Kang, G., Ahmed, T., Bessong, P., Ali, A., Mduma, E., Peñataro Yori, P., Faubion, W. A., Lima, A. A. M., Paredes Olortegui, M., Mason, C., Babji, S., Singh, R. J., Qureshi, S., Kosek, P. S., Samie, A., Pascal, J. & 7 others, Shrestha, S., McCormick, B. J. J., Seidman, J. C., Lang, D. R., Zaidi, A., Caulfield, L. E. & Gottlieb, M., Jul 1 2017, In : Journal of Pediatric Gastroenterology and Nutrition. 65, 1, p. 31-39 9 p.

Research output: Contribution to journalArticle

Lactulose
Mannitol
Permeability
Sex Characteristics
Brazil
13 Citations (Scopus)
Metabolomics
Polycystic Ovary Syndrome
Metabolic Networks and Pathways
Insulin Resistance
Branched Chain Amino Acids
10 Citations (Scopus)

Constipation-Predominant Irritable Bowel Syndrome Females Have Normal Colonic Barrier and Secretory Function

Peters, S. A., Edogawa, S., Sundt, W. J., Dyer, R. B., Dalenberg, D. A., Mazzone, A., Singh, R. J., Moses, N., Smyrk, T. C., Weber, C., Linden, D. R., MacNaughton, W. K., Turner, J. R., Camilleri, M., Katzka, D. A., Farrugia, G. & Grover, M., Mar 21 2017, (Accepted/In press) In : American Journal of Gastroenterology.

Research output: Contribution to journalArticle

Lactulose
Irritable Bowel Syndrome
Tight Junctions
Mannitol
Constipation
4 Citations (Scopus)

Effects of cholecalciferol supplementation on serum and urinary vitamin D metabolites and binding protein in HIV-infected youth

Eckard, A. R., Thierry-Palmer, M., Silvestrov, N., Rosebush, J. C., O'Riordan, M. A., Daniels, J. E., Uribe-Leitz, M., Labbato, D., Ruff, J. H., Singh, R. J., Tangpricha, V. & McComsey, G. A., Apr 1 2017, In : Journal of Steroid Biochemistry and Molecular Biology. 168, p. 38-48 11 p.

Research output: Contribution to journalArticle

efavirenz
Vitamin D-Binding Protein
Cholecalciferol
Metabolites
Vitamin D
24 Citations (Scopus)

High-resolution, accurate-mass (HRAM) mass spectrometry urine steroid profiling in the diagnosis of adrenal disorders

Hines, J. M., Bancos, I., Bancos, C., Singh, R. D., Avula, A. V., Young, W. F., Grebe, S. K. & Singh, R. J., Dec 1 2017, In : Clinical Chemistry. 63, 12, p. 1824-1835 12 p.

Research output: Contribution to journalArticle

Mass spectrometry
Mass Spectrometry
Steroids
Urine
Metabolites
2 Citations (Scopus)

Hypothalamo-pituitary-adrenal axis after a single epidural triamcinolone injection

Iranmanesh, A., Gullapalli, D., Singh, R. J. & Veldhuis, J. D., Aug 1 2017, In : Endocrine. 57, 2, p. 308-313 6 p.

Research output: Contribution to journalArticle

Epidural Injections
Triamcinolone
Hydrocortisone
Adrenocorticotropic Hormone
Corticotropin-Releasing Hormone
10 Citations (Scopus)

Impact of Calcium and Two Doses of Vitamin D on Bone Metabolism in the Elderly: A Randomized Controlled Trial

Rahme, M., Sharara, S. L., Baddoura, R., Habib, R. H., Halaby, G., Arabi, A., Singh, R. J., Kassem, M., Mahfoud, Z., Hoteit, M., Daher, R. T., Bassil, D., El Ferkh, K. & El-Hajj Fuleihan, G., Jul 1 2017, In : Journal of Bone and Mineral Research. 32, 7, p. 1486-1495 10 p.

Research output: Contribution to journalArticle

Vitamin D
National Academies of Science, Engineering, and Medicine (U.S.) Health and Medicine Division
Arm
Randomized Controlled Trials
Calcium
2 Citations (Scopus)

Measurement of gut permeability using fluorescent tracer agent technology

Dorshow, R. B., Hall-Moore, C., Shaikh, N., Talcott, M. R., Faubion, W. A., Rogers, T. E., Shieh, J. J., Debreczeny, M. P., Johnson, J. R., Dyer, R. B., Singh, R. J. & Tarr, P. I., Dec 1 2017, In : Scientific Reports. 7, 1, 10888.

Research output: Contribution to journalArticle

Fluorescent Dyes
Indomethacin
Permeability
Technology
Wounds and Injuries
17 Citations (Scopus)

Perspective and priorities for improvement of parathyroid hormone (PTH) measurement - A view from the IFCC Working Group for PTH

IFCC Working Group for PTH, Apr 1 2017, In : Clinica Chimica Acta. 467

Research output: Contribution to journalArticle

Parathyroid Hormone
Chronic Renal Insufficiency
Minerals
Chronic Kidney Disease-Mineral and Bone Disorder
Clinical Chemistry
5 Citations (Scopus)

Role of Mass Spectrometry in Clinical Endocrinology

Ketha, S. S., Singh, R. J. & Ketha, H., 2017, (Accepted/In press) In : Endocrinology and Metabolism Clinics of North America.

Research output: Contribution to journalArticle

Endocrinology
Tandem Mass Spectrometry
Liquid Chromatography
Mass Spectrometry
Endocrine System Diseases
17 Citations (Scopus)

Upregulation of TET activity with ascorbic acid induces epigenetic modulation of lymphoma cells

Shenoy, N., Bhagat, T., Nieves, E., Stenson, M., Lawson, J., Choudhary, G. S., Habermann, T. M., Nowakowski, G. S., Singh, R. J., Wu, X., Verma, A. & Witzig, T. E., Jul 21 2017, In : Blood Cancer Journal. 7, 7, p. e587

Research output: Contribution to journalArticle

Epigenomics
Ascorbic Acid
Lymphoma
Up-Regulation
Tumor Suppressor Genes
2016
13 Citations (Scopus)

13C mannitol as a novel biomarker for measurement of intestinal permeability

Grover, M., Camilleri, M., Hines, J., Burton, D., Ryks, M., Wadhwa, A., Sundt, W., Dyer, R. & Singh, R. J., 2016, (Accepted/In press) In : Neurogastroenterology and Motility.

Research output: Contribution to journalArticle

Mannitol
Permeability
Biomarkers
Lactulose
Urine Specimen Collection
4 Citations (Scopus)

Abnormalities in biomarkers of mineral and bone metabolism in kidney donors

Kasiske, B. L., Kumar, R., Kimmel, P. L., Pesavento, T. E., Kalil, R. S., Kraus, E. S., Rabb, H., Posselt, A. M., Anderson-Haag, T. L., Steffes, M. W., Israni, A. K., Snyder, J. J., Singh, R. J. & Weir, M. R., Mar 9 2016, (Accepted/In press) In : Kidney International.

Research output: Contribution to journalArticle

Minerals
Biomarkers
Tissue Donors
Kidney
Bone and Bones
11 Citations (Scopus)

A spectrum of views on clinical mass spectrometry

Annesley, T., Diamandis, E., Bachmann, L., Hanash, S., Hart, B., Javahery, R., Singh, R. J. & Smith, R., Jan 1 2016, In : Clinical Chemistry. 62, 1, p. 30-36 7 p.

Research output: Contribution to journalArticle

Liquid chromatography
Mass spectrometry
17 Citations (Scopus)

Clinical and biochemical phenotypes of adults with monoallelic and biallelic CYP24A1 mutations: evidence of gene dose effect

O’Keeffe, D. T., Tebben, P., Kumar, R., Singh, R. J., Wu, Y. & Wermers, R. A., Apr 29 2016, (Accepted/In press) In : Osteoporosis International. p. 1-5 5 p.

Research output: Contribution to journalArticle

Phenotype
Mutation
Genes
Nephrolithiasis
Hypercalcemia
7 Citations (Scopus)

Clinical peptide and protein quantification by mass spectrometry (MS)

Grebe, S. K. G. & Singh, R. J., 2016, (Accepted/In press) In : Trends in Analytical Chemistry.

Research output: Contribution to journalArticle

peptide
Mass spectrometry
mass spectrometry
Assays
Peptides
7 Citations (Scopus)

CYP2R1 polymorphisms are important modulators of circulating 25-hydroxyvitamin D levels in elderly females with vitamin insufficiency, but not of the response to vitamin D supplementation

Arabi, A., Khoueiry-Zgheib, N., Awada, Z., Mahfouz, R., Al-Shaar, L., Hoteit, M., Rahme, M., Baddoura, R., Halabi, G., Singh, R. J. & El Hajj Fuleihan, G., Jul 30 2016, (Accepted/In press) In : Osteoporosis International. p. 1-12 12 p.

Research output: Contribution to journalArticle

Vitamin D
Vitamins
Single Nucleotide Polymorphism
Cholecalciferol
Genotype
15 Citations (Scopus)

Effect of Vitamin D replacement on indexes of insulin resistance in overweight elderly individuals: A randomized controlled trial

Fuleihan, G. E. H., Baddoura, R., Habib, R. H., Halaby, G., Arabi, A., Rahme, M., Singh, R. J., Kassem, M., Mahfoud, Z., Hoteit, M., Daher, R. T. & Kassir, M. F., Aug 1 2016, In : American Journal of Clinical Nutrition. 104, 2, p. 315-323 9 p.

Research output: Contribution to journalArticle

Vitamin D
Insulin Resistance
Randomized Controlled Trials
Homeostasis
Calcium Citrate
14 Citations (Scopus)

Impact of long-term poor and good glycemic control on metabolomics alterations in type 1 diabetic people

Dutta, T., Kudva, Y. C., Persson, X. M. T., Schenck, L. A., Charles Ford, G., Singh, R. J., Carter, R. E. & Nair, K. S., Mar 1 2016, In : Journal of Clinical Endocrinology and Metabolism. 101, 4, p. 1023-1033 11 p.

Research output: Contribution to journalArticle

Metabolomics
Medical problems
Type 1 Diabetes Mellitus
Metabolites
Glycosylated Hemoglobin A
15 Citations (Scopus)

Improving the detection of environmental enteric dysfunction: A lactulose, rhamnose assay of intestinal permeability in children aged under 5 years exposed to poor sanitation and hygiene

Faubion, W. A., Camilleri, M., Murray, J. A., Kelly, P., Amadi, B., Kosek, M. N., Enders, F. T., Larson, J., Grover, M., Boe, G., Dyer, R. & Singh, R. J., Jan 1 2016, In : BMJ Global Health. 1, 1, e000066.

Research output: Contribution to journalArticle

Open Access
Lactulose
Rhamnose
Sanitation
Hygiene
Zambia
2 Citations (Scopus)

Interleukins 6 and 8 and abdominal fat depots are distinct correlates of lipid moieties in healthy pre- and postmenopausal women

Veldhuis, J. D., Dyer, R. B., Trushin, S. A., Bondar, O. P., Singh, R. J. & Klee, G. G., Jul 22 2016, (Accepted/In press) In : Endocrine. p. 1-10 10 p.

Research output: Contribution to journalArticle

Abdominal Fat
Interleukin-8
Intra-Abdominal Fat
HDL Cholesterol
Interleukin-6
27 Citations (Scopus)

LC-MS/MS for identifying patients with CYP24A1 mutations

Ketha, H., Kumar, R. & Singh, R. J., Jan 1 2016, In : Clinical Chemistry. 62, 1, p. 236-242 7 p.

Research output: Contribution to journalArticle

Mutation
Hypercalcemia
Genetic Testing
Testing
Dihydroxycholecalciferols
74 Citations (Scopus)

Mutations in the nuclear bile acid receptor FXR cause progressive familial intrahepatic cholestasis

Gomez-Ospina, N., Potter, C. J., Xiao, R., Manickam, K., Kim, M. S., Kim, K. H., Shneider, B. L., Picarsic, J. L., Jacobson, T. A., Zhang, J., He, W., Liu, P., Knisely, A. S., Finegold, M. J., Muzny, D. M., Boerwinkle, E., Lupski, J. R., Plon, S. E., Gibbs, R. A., Eng, C. M. & 9 others, Yang, Y., Washington, G. C., Porteus, M. H., Berquist, W. E., Kambham, N., Singh, R. J., Xia, F., Enns, G. M. & Moore, D. D., Feb 18 2016, In : Nature Communications. 7, 10713.

Research output: Contribution to journalArticle

mutations
Bile Acids and Salts
liver
Cholestasis
Liver
17 Citations (Scopus)

Randomized trial of aromatase inhibitors, growth hormone, or combination in pubertal boys with idiopathic, short stature

Mauras, N., Ross, J. L., Gagliardi, P., Yu, Y. M., Hossain, J., Permuy, J., Damaso, L., Merinbaum, D., Singh, R. J., Gaete, X. & Mericq, V., Dec 1 2016, In : Journal of Clinical Endocrinology and Metabolism. 101, 12, p. 4984-4993 10 p.

Research output: Contribution to journalArticle

Aromatase Inhibitors
Growth Hormone
letrozole
Safety
Bone
64 Citations (Scopus)

Recommendations for the generation, quantification, storage, and handling of peptides used for mass spectrometry-based assays

Hoofnagle, A. N., Whiteaker, J. R., Carr, S. A., Kuhn, E., Liu, T., Massoni, S. A., Thomas, S. N., Reid Townsend, R., Zimmerman, L. J., Boja, E., Chen, J., Crimmins, D. L., Davies, S. R., Gao, Y., Hiltke, T. R., Ketchum, K. A., Kinsinger, C. R., Mesri, M., Meyer, M. R., Qian, W. J. & 35 others, Schoenherr, R. M., Scott, M. G., Shi, T., Whiteley, G. R., Wrobel, J. A., Wu, C., Ackermann, B. L., Aebersold, R., Barnidge, D. R., Bunk, D. M., Clarke, N., Fishman, J. B., Grant, R. P., Kusebauch, U., Kushnir, M. M., Lowenthal, M. S., Moritz, R. L., Neubert, H., Patterson, S. D., Rockwood, A. L., Rogers, J., Singh, R. J., Van Eyk, J. E., Wong, S. H., Zhang, S., Chan, D. W., Chen, X., Ellis, M. J., Liebler, D. C., Rodland, K. D., Rodriguez, H., Smith, R. D., Zhang, Z., Zhang, H. & Paulovich, A. G., Jan 1 2016, In : Clinical Chemistry. 62, 1, p. 48-69 22 p.

Research output: Contribution to journalArticle

Mass spectrometry
Assays
Mass Spectrometry
Peptides
Proteins
4 Citations (Scopus)

Thyroid hormone testing in the 21st century

Singh, R. J. & Kaur, P., 2016, (Accepted/In press) In : Clinical Biochemistry.

Research output: Contribution to journalArticle

Thyroid Hormones
Assays
Thyroid Gland
Testing
Immunoassay
2015
7 Citations (Scopus)

25-hydroxyvitamin D can interfere with a common assay for 1,25-dihydroxyvitamin D in vitamin D intoxication

Hawkes, C. P., Schnellbacher, S., Singh, R. J. & Levine, M. A., Aug 1 2015, In : Journal of Clinical Endocrinology and Metabolism. 100, 8, p. 2883-2889 7 p.

Research output: Contribution to journalArticle

Vitamin D
Assays
Serum
Liquid chromatography
Metabolites
15 Citations (Scopus)

Altered calcium and Vitamin D homeostasis in first-time calcium kidney stone-formers

Ketha, H., Singh, R. J., Grebe, S. K., Bergstralh, E. J., Rule, A. D., Lieske, J. C. & Kumar, R., Sep 2 2015, In : PLoS One. 10, 9, e0137350.

Research output: Contribution to journalArticle

renal calculi
Kidney Calculi
vitamin D
fibroblast growth factors
Vitamin D
13 Citations (Scopus)

Can vitamin D metabolite measurements facilitate a “treat-to-target” paradigm to guide vitamin D supplementation?

Binkley, N., Lappe, J., Singh, R. J., Khosla, S., Krueger, D., Drezner, M. K. & Blank, R. D., May 1 2015, In : Osteoporosis International. 26, 5, p. 1655-1660 6 p.

Research output: Contribution to journalArticle

Vitamin D
Cholecalciferol
Serum
Linear Models
Prospective Studies
31 Citations (Scopus)

Changing incidence of serum 25-hydroxyvitamin d values above 50 ng/mL: A 10-year population-based study

Dudenkov, D. V., Yawn, B. P., Oberhelman, S. S., Fischer, P. R., Singh, R. J., Cha, S. S., Maxson, J. A., Quigg, S. M. & Thacher, T. D., May 1 2015, In : Mayo Clinic Proceedings. 90, 5, p. 577-586 10 p.

Research output: Contribution to journalArticle

antineoplaston A10
Hypercalcemia
Incidence
Serum
Population
18 Citations (Scopus)

Clinical assays for quantitation of insulin-like-growth-factor-1 (IGF1)

Ketha, H. & Singh, R. J., Jun 15 2015, In : Methods. 81, p. 93-98 6 p.

Research output: Contribution to journalArticle

Somatomedins
Assays
Mass spectrometry
Immunoassay
Growth Hormone
33 Citations (Scopus)

CYP2R1 mutations impair generation of 25-hydroxyvitamin D and cause an atypical form of vitamin D deficiency

Thacher, T. D., Fischer, P. R., Singh, R. J., Roizen, J. & Levine, M. A., Jul 1 2015, In : Journal of Clinical Endocrinology and Metabolism. 100, 7, p. E1005-E1013

Research output: Contribution to journalArticle

Vitamin D Deficiency
Rickets
Vitamin D
Mixed Function Oxygenases
Mutation
15 Citations (Scopus)

Detection of IGF-1 protein variants by use of LC-MS with high-resolution accurate mass in routine clinical analysis

Hines, J., Milosevic, D., Ketha, H., Taylor, R., Algeciras-Schimnich, A., Grebe, S. K. & Singh, R. J., Jul 1 2015, In : Clinical Chemistry. 61, 7, p. 990-991 2 p.

Research output: Contribution to journalArticle

Blood Chemical Analysis
Insulin-Like Growth Factor I
Liquid Chromatography
Mass Spectrometry
Proteins
19 Citations (Scopus)

Estradiol assays - The path ahead

Ketha, H., Girtman, A. & Singh, R. J., Jul 1 2015, In : Steroids. 99, PA, p. 39-44 6 p.

Research output: Contribution to journalArticle

Estradiol
Assays
Immunoassay
Aromatase Inhibitors
Monitoring
22 Citations (Scopus)

Iatrogenic vitamin D toxicity in an infant - A case report and review of literature

Ketha, H., Wadams, H., Lteif, A. & Singh, R. J., 2015, In : Journal of Steroid Biochemistry and Molecular Biology. 148, p. 14-18 5 p.

Research output: Contribution to journalArticle

Cholecalciferol
Vitamin D
Toxicity
Hypercalcemia
Hypercalciuria