Tsuda H, Matsumoto M, Yamamoto K, Kawabata M, Hidaka A, Kusuda S, Kobayashi Y
Department of *Obstetrics and Gynecology, Osaka City General Hospital, Japan.
J Clin Ultrasound. 1996 May;24(4):217-9. doi: 10.1002/(SICI)1097-0096(199605)24:4<217::AID-JCU11>3.0.CO;2-I.