1. Department of Anatomy, Shandong University School of Medicine, Jinan, Shandong Province, China
2. Department of Cardiosurgery, Shandong University Qilu Hospital, Jinan, Shandong Province, China
3. Department of Histology and Embryology, Binzhou Medical College, Binzhou, China
4. Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, Shandong Province, China
5. Department of Rheumatology, Shandong University Qilu Hospital, Jinan, Shandong Province, China