1. Department of Reproductive Medicine, Linyi People's Hospital, Linyi, Shandong Province, P.R. China.
2. Department of Obstetrics and Gynecology, Linyi People's Hospital, Linyi, Shandong Province, P.R. China.
3. Department of Clinical Laboratory, Linyi People's Hospital, Linyi, Shandong Province, P.R. China.
4. Department of Anatomy, School of Basic Medical Sciences, Shandong University, Jinan, Shandong Province, P.R. China.
5. Department of Medical Genetics, Linyi People's Hospital, Linyi, Shandong Province, P.R. China.