1. Department of Oral and Maxillofacial Surgery; Toyota Memorial Hospital; Toyota Japan
2. Department of Public Health; Aichi Medical University School of Medicine; Nagakute Japan
3. Laboratory of Biometry and Bioinformatics, Graduate School of Agriculture and Life Sciences; University of Tokyo; Tokyo Japan
4. Department of Maxillofacial Surgery; Aichi-Gakuin University; Nagoya Japan
5. Department of oral and maxillofacial surgery; Himeji Red Cross Hospital; Himeji Japan
6. Department of Perinatology; Institute for Developmental Research, Aichi Human Service Center; Kasugai Japan