1. Medical Insurance Department, Zhangqiu District People’s Hospital, Jinan 250200, Shandong Province, China
2. Department of Clinical Laboratory, Zhangqiu District People’s Hospital, Jinan 250200, Shandong Province, China
3. Department of Gynaecology, Renzheng Hospital, Renzheng 265811, Shandong Province, China
4. PIVAS, Yantaishan Hospital, Yantai 264001, Shandong Province, China