1. Graduate Institute of Clinical Medical Sciences; College of Medicine; Chang Gung University; Taoyuan Taiwan
2. Department of Neurosurgery; Wan Fang Hospital; Taipei Medical University; Taipei Taiwan
3. Department of Neurosurgery; School of Medicine; Fu Jen Catholic University Hospital; Fu Jen Catholic University; New Taipei City Taiwan
4. Department of Neurosurgery; Shuang Ho Hospital; Taipei Medical University; Taipei Taiwan
5. Department of Public Health; College of Medicine; Chang Gung University; Taoyuan Taiwan
6. Department of Otolaryngology-Head and Neck Surgery; Chang Gung Memorial Hospital; Chang Gung University; Taoyuan Taiwan
7. Department of Medicine; University of Miami Miller School of Medicine; Miami Florida