1. Department of Pathology, Changchun Obstetrics-Gynecology Hospital, Changchun, Jilin, China (mainland)
2. Geisinger Commonwealth School of Medicine, Scranton, USA
3. Department of Pathology, Jilin Cancer Hospital, Changchun, Jilin, China (mainland)
4. Department of Obstetrics and Gynecology, Changchun Obstetrics-Gynecology Hospital, Changchun, Jilin, China (mainland)