1. Department of Nephrology, Shenzhen Second People's Hospital, First Affiliated Hospital of Shenzhen University , Shenzhen, Guangdong , P.R. China
2. Shantou University Medical College , Shantou, Guangdong , P.R. China
3. Department of Epidemiology and Biostatistics, Empower U, X&Y Solutions Inc. , Boston, MA , USA
4. Department of Immunology and Microbiology, Guiyang College of Traditional Chinese Medicine , Guiyang, Guizhou , China