1. Professor of Obstetrics and Gynecology, & Epidemiology, University of Iowa, Iowa City, USA
2. WHI Clinical Coordinating Center and Program in Biostatistics, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
3. Director, Division of Reproductive Endocrinology and Infertility, Montefiore Medical Center, USA
4. Associate Professor of Medicine, and Associate Professor of Gynecology and Obstetrics, Stanford University, California, USA