Department of Family Medicine, Taipei Medical University Hospital, Taipei, Taiwan. Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan. School of Public Health, College of Public Health and Nutrition, Taipei Medical University, Taipei, Taiwan. School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan. Department of Chinese Medicine, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan. Department of Pediatrics, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. Department of Physical Medicine and Rehabilitation, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan. Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.