1. Department of Rheumatology, Qilu Hospital of Shandong University, Ji’nan, Shandong, China (mainland)
2. Department of Blood Purification, People’s Hospital of Binhai Economic and Technological Development Zone, Weifang, Shandong, China (mainland)
3. Department of Joint Surgery, Shandong General Team Hospital of Chinese People’s Armed Police Force, Ji’nan, Shandong, China (mainland)