- University of Pittsburgh
- Harvard University
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- University of Pennsylvania
- The Children's Hospital of Philadelphia
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- University of Pennsylvania
- The Children's Hospital of Philadelphia
External person
- University of Modena and Reggio Emilia
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- University of California at San Francisco
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- University of Modena and Reggio Emilia
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- Dartmouth Medical School
- Dartmouth College
- Department of Pharmacology
- Stanford University
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- University of California at San Francisco
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- Washington Univ. School of Medicine
- Box 8118
- Washington University St. Louis
- Department of Pediatrics
- University of Pennsylvania
- The Children's Hospital of Philadelphia
External person
- University of Pennsylvania
- The Children's Hospital of Philadelphia
External person
- Department of Dermatology
- Saint Louis University
- Saint Louis Univ. Hlth. Sci. Center
- University of Florida
External person
- University of Pennsylvania
External person
- University of Pennsylvania
External person
- University of Pennsylvania
External person
- University of Pennsylvania
- The Children's Hospital of Philadelphia
External person
- University of Pennsylvania
External person