1. Department of Ob/Gyn/REI, Temple University Hospital, 3401 N. Broad Street, Philadelphia 19140, PA, USA
2. University of Texas Medical Branch at Galveston, TX, USA
3. University of California, San Francisco General Hospital, San Francisco, CA, USA
4. University of New Mexico School of Medicine, Albuquerque, NM, USA
5. Upjohn Company, Kalamazoo, MI, USA