Weiss H, Sherer D M, Manning F A
The Department of Obstetrics, Gynecology and Women's Health, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York, USA.
Obstet Gynecol. 1999 Nov;94(5 Pt 2):852. doi: 10.1016/s0029-7844(99)00498-6.