[1] UNIV MICHIGAN, DEPT PEDIAT, PROGRAM REPROD ENDOCRINOL, ANN ARBOR, MI 48109 USA
[2] UNIV MICHIGAN, DEPT OBSTET & GYNECOL, PROGRAM REPROD ENDOCRINOL, ANN ARBOR, MI 48109 USA
[3] UNIV MICHIGAN, DEPT BIOL CHEM, PROGRAM REPROD ENDOCRINOL, ANN ARBOR, MI 48109 USA