1. Department of Nephrology; the First Affiliated Hospital; Zhengzhou University; Zhengzhou China
2. Arthritis Research UK Primary Care Centre; Research Institute for Primary Care & Health Sciences; Keele University; Keele UK
3. Division of Health and Social Care; King College London; London UK
4. Jiangsu Province Hospital on Integration of Chinese and Western Medicine; Nanjing China
5. Jiangsu Province People's Hospital; Nanjing China
6. Western Sydney University; Campbelltown Sydney NSW Australia
7. Department of Rural Health; University of Melbourne; Australia