1. Graduate Institute of Clinical Dentistry; National Taiwan University; Taipei Taiwan
2. School of Dentistry; National Taiwan University; Taipei Taiwan
3. Department of Dentistry; China Medical University Hospital; College of Medicine; China Medical University; Taichung Taiwan
4. School of Dentistry; College of Medicine; China Medical University; Taichung Taiwan
5. Graduate Institute of Oral Biology; School of Dentistry; National Taiwan University; Taipei Taiwan
6. Department of Dentistry; National Taiwan University Hospital; College of Medicine; National Taiwan University; Taipei Taiwan