Institutions:
1 Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China
2 Shandong First Medical University, Jinan 250117, Shandong, China
3 Department of Rheumatology and Immunology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250021, Shandong, China
4 Department of Rheumatology and Immunology, Shandong Provincial Hospital, Affiliated to Shandong First Medical University, Jinan 250021, Shandong, China