1. Graduate Institute of Oral Biology, School of Dentistry; National Taiwan University and Department of Operative Dentistry, National Taiwan University Hospital; Taipei Taiwan
2. Graduate Institute of Oral Biology, School of Dentistry; National Taiwan University; Taipei Taiwan
3. College of Life Science, Kaohsiung Medical University; Kaohsiung Taiwan
4. Department of Periodontology, Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
5. Graduate Institute of Clinical Dentistry, School of Dentistry; National Taiwan University and Department of Periodontology, National Taiwan University Hospital; Taipei Taiwan