1. Chang Gung University of Science and Technology Taoyuan City Taiwan
2. Department of Dentistry Chang Gung Memorial Hospital Taipei Taiwan
3. School of Dentistry & Department of Dentistry National Taiwan University Medical College and National Taiwan University Hospital Taipei Taiwan
4. Division of Periodontology, College of Dentistry The Ohio State University Columbus Ohio USA
5. School of Dentistry, College of Dental Medicine Kaohsiung Medical University Kaohsiung Taiwan
6. Department of Dentistry Kaohsiung Medical University Hospital Kaohsiung City Taiwan