1. Kidney Research Center, Nephrology Department, Chang Gung Memorial Hospital in Linkou, Chang Gung University College of Medicine , Taoyuan , Taiwan
2. Nephrology Department, Chansn Hospital , Taoyuan City , Taiwan
3. Department of Hematology and Oncology, Chang Gung Memorial Hospital in Linkou and College of Medicine, Chang Gung University , Taoyuan , Taiwan
4. School of Medicine, College of Medicine, Chang Gung University; Department of Dermatology, Chang Gung Memorial Hospital , Linkou, Taoyuan , Taiwan
5. Graduate Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University , Taipei , Taiwan
6. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health , Baltimore, MD , USA