1. Department of Oral Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
2. Dental Implant Clinic, Dental Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
3. Regenerative Dentistry and Implant Center, Kyushu University Hospital, Kyushu University, Fukuoka, Japan.
4. Department of Biomaterials, Kyushu University Faculty of Dental Science, Fukuoka, Japan.