1. Department of Ophthalmology, Chang Gung Memorial Hospital, Guishan, Taoyuan, Taiwan2Department of Medicine, Chang Gung University, College of Medicine, Taoyuan, Taiwan
2. Department of Medicine, Chang Gung University, College of Medicine, Taoyuan, Taiwan3Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan
3. Department of Health Care Administration, Oriental Institute of Technology, New Taipei City, Taiwan5Department of Business Administration, National Taiwan University, Taipei, Taiwan