1. Department of Endocrinology and Metabolism, The Affiliated Hospital of Qingdao University, Shandong Provincial Key Laboratory of Metabolic Diseases and Qingdao Key Laboratory of Gout, Qingdao, China
2. Institute of Metabolic Diseases, Qingdao University, Qingdao, China
3. Department of Biochemistry, University of Otago, Dunedin, New Zealand
4. Division of Clinical Immunology and Rheumatology, University of Alabama Birmingham, Birmingham, AL, USA