Interlaboratory comparison study of serum total testoserone measurements performed by mass spectrometry methods

Hubert W. Vesper, Shalender Bhasin, Christina Wang, Susan S. Tai, Larry A. Dodge, Ravinder J. Singh, Judie Nelson, Susan Ohorodnik, Nigel J. Clarke, Wael A. Salameh, C. Richard Parker, Raj Razdan, Elizabeth A. Monsell, Gary L. Myers