1. Developmental Endocrinology BranchNational Institute of Child Health and Human DevelopmentBethesdaMDUSA
2. Endocrinology and Reproduction Research BranchNational Institute of Child Health and Human DevelopmentBethesdaMDUSA
3. Meloy LaboratoriesGaithersburgMDUSA
4. Departments of Medicine and PhysiologyUniversity of ManitobaWinnipegCanada