1. Department of Oral Science; Graduate School of Medicine; Chiba University; Chiba Japan
2. Department of Dentistry and Oral-Maxillofacial Surgery; Chiba University Hospital; Chiba Japan
3. Department of Dentistry and Oral Surgery; Eastern Chiba Medical Center; Chiba Japan
4. Department of Dentistry and Oral-Maxillofacial Surgery; Chibaken Saiseikai Narashino Hospital; Chiba Japan
5. Department of Medical Oncology; Graduate School of Medicine; Chiba University; Chiba Japan