[1] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Program Reprod & Adult Endocrinol, NIH, Bethesda, MD 20892 USA
[2] Walter Reed Army Med Ctr, Washington, DC 20307 USA
[3] Eunice Kennedy Shriver Natl Inst Child Hlth & Hum, Epidemiol Branch, NIH, Bethesda, MD 20892 USA
[4] Brooke Army Med Ctr, San Antonio Uniformed Serv Hlth Educ Consortium, Wilford Hall Med Ctr, San Antonio, TX USA
[5] Tripler Army Med Ctr, Honolulu, HI 96859 USA