作者单位: | [1]Dr. T.F. Esakoff, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, Box0132, 505 Parnassus Avenue, San Francisco, CA94143, United States [2]不详, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, Box0132, 505 Parnassus Avenue, San Francisco, CA94143, United States |