1. Department of General Medicine, Jining No. 1 People’s Hospital, Jining, China;
2. Department of Internal Medicine-Cardiovascular, Affiliated Hospital of Taishan Medical University, Taian, China;
3. Department of Joint Branch, Jining No. 2 People’s Hospital, Jining, China;
4. Department of Gynecology, Affiliated Hospital of Jining Medical University, Jining, China;
5. Department of Public Health, Jining Psychiatric Hospital, Jining, China;
6. Department of Obstetrics and Gynecology, People's Hospital of Jiaxiang County, Jining, China