1. Department of Dentistry and Oral‐Maxillofacial SurgeryJapanese Red Cross Fukaya Hospital Saitama Japan
2. Department of Dentistry and Oral‐Maxillofacial SurgeryChiba University Hospital Chiba Japan
3. Department of Dentistry and Oral‐Maxillofacial SurgeryChibarosai Hospital Chiba Japan
4. Department of Oral ScienceGraduate School of MedicineChiba University Chiba Japan