1. Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
2. Department of Dentistry, National Yang Ming Chiao Tung University Hospital, Yilan County, Taiwan
3. Department of Stomatology, Oral & Maxillofacial Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
4. Department of Dentistry, Far Eastern Memorial Hospital, New Taipei, Taiwan