Affiliation: | ? Associate Chief, Department of Oral Surgery, Hiroshima Red Cross Atomic-Bomb Survivors Hospital, Hiroshima, Japan;† Instructor, Department of Oral Surgery, Hiroshima Red Cross Atomic-Bomb Survivors Hospital, Hiroshima, Japan;‡ Chief, Department of Oral Surgery, Hiroshima Red Cross Atomic-Bomb Survivors Hospital, Hiroshima, Japan;§ Associate Chief, Department of Pediatrics, Department of Oral Surgery, Hiroshima Red Cross Atomic-Bomb Survivors Hospital, Hiroshima, Japan |