1. Endocrinology and Reproduction Research Branch (S.J., R.D.S., A.J.B., K.J.C.), National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
2. Division of Cardio-Renal Products, Center for Drug Evaluation and Research, Food and Drug Administration, Rockville, Maryland 20857 (G.J.)
3. Department of Physiology, Semmelweis University of Medicine, H-1088, Budapest, Hungary (L.H.)