[1]Department of Gynecology and Obstetrics, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China [2]Department of Gynecology and Obstetrics, Yuhuangding Hospital of Yantai, Yantai 264000, China
基金项目:
This study is supported by the Fund of Fujian Provincial Health Department for the Transcenturial Scholarship Leaders (99J 122).