[1] The Center for Human Reproduction-New York and the Foundation for Reproductive Medicine,Department of Obstetrics, Gynecology and Reproductive Sciences
[2] Yale University School of Medicine,Department of Obstetrics and Gynecology
[3] Toronto West Fertility Associates,Departments of Epidemiology and Social Medicine and Obstetrics
[4] Vienna University School of Medicine,undefined
[5] Gynecology and Women's Health,undefined
[6] Albert Einstein College of Medicine,undefined