1. International College of Dentistry, Walailak University, Bangkok, Thailand
2. Research Unit of Herbal Medicine, Biomaterials and Materials for Dental Treatment, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
3. Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
4. Department of Periodontology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
5. Department of Periodontics, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal
6. Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand