Sakamoto H, Suzuki H, Hayakawa S, Kiseki Y, Miyakawa Y, Ohkubo Y, Watanabe Y, Takami M, Kashiwazaki K, Tanaka H
Department of Obstetrics and Gynecology, Nihon University School of Medicine, Tokyo.
Nihon Sanka Fujinka Gakkai Zasshi. 1989 Sep;41(9):1491-4.