1. First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
2. Reproductive and Genetic Center of Integrated Traditional and Western Medicine, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
3. School of Medicine, Department of Orthopedics, University of Colorado, Colorado, CO, USA
4. The personnel department, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China