Zhang Qiong, Wang Liang, Zheng Wei
Department of Gynecology, Second Affiliated Hospital, Zhejiang University, College of Medicine, Zhejiang Hangzhou, China.
Int J Gynaecol Obstet. 2006 Nov;95(2):177-8. doi: 10.1016/j.ijgo.2006.07.006. Epub 2006 Aug 22.