1. Department of Nephrology, Second Xiangya Hospital of Central South University , Changsha, Hunan , China
2. Hunan Key Laboratory of Kidney Disease and Blood Purification , Changsha, Hunan , China
3. Department of Physiology, Xiangya School of Medicine, Central South University , Changsha, Hunan , China
4. Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood VA Medical Center , Augusta, GA , USA