1. Department of Gynaecology, The People’s Hospital of Yuxi City, The Sixth Affiliated Hospital of Kunming Medical University, Yuxi, Yunnan, China (mainland)
2. Department of Gastroenterology, Dali Bai Autonomous Prefecture People’s Hospital, Dali, Yunnan, China (mainland)
3. Department of Gynecology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China (mainland)