1. Department of Reproductive Medicine, Dongying People’s Hospital, Dongying, Shandong, China
2. Department of Obstetrics and Gynecology, Dongying People’s Hospital, Dongying, Shandong, China
3. Department of Orthopaedics, Dongying People’s Hospital, Dongying, Shandong, China
4. Department of Respiratory, Dongying People’s Hospital, Dongying, Shandong, China