1. School of Information Science and Engineering, Yunnan University, Kunming 650091, China
2. School of Clinical Medicine, Tsinghua University, Beijing 100084, China
3. Center for Reproductive Medicine, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350004, China
4. Vanke School of Public Health, Tsinghua University, Beijing 100084, China
5. Department of Dermatology, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China