Division of Nephrology, Department of Medicine, Taipei City Hospital, Zhong-Xing Branch, Taipei, Taiwan. School of Medicine, National Yang-Ming University, Taipei, Taiwan. Institute of Environmental and Occupational Health Sciences, School of Medicine, National Yang-Ming University, Taipei, Taiwan. College of Science and Engineering, Fu Jen Catholic University, New Taipei City, Taiwan. Institute of Public Health and Community Medicine Research Centre, National Yang-Ming University, Taipei, Taiwan. Department of Health Care Management, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan. Department of Neurosurgery, Taipei City Hospital, Taipei, Taiwan. Department of Child Psychiatry, Chang Gung Memorial Hospital and University, Taoyuan, Taiwan. Division of Nephrology, and Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan. College of Medicine & Graduate Institute of Business Administration, Fu Jen Catholic University, New Taipei City, Taiwan. Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu, Taiwan. Department of Nursing, Yuanpei University, Hsinchu, Taiwan.