1. Department of Neurosurgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
2. School of Medicine, Tzu Chi University, Hualien, Taiwan
3. Department of Otolaryngology-Head and Neck Surgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
4. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan