1. Department of Maxillofacial Surgery, Aichi-Gakuin University School of Dentistry, Nagoya, Japan.
2. Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Japan.
3. Department of Oral and Maxillofacial Surgery, Toyota Memorial Hospital, Toyota, Japan.
4. Department of Dentistry and Oral Surgery, Aichi Children’s Health and Medical Center, Obu, Japan.
5. Department of Oral and Maxillofacial Surgery, Ogaki Municipal Hospital, Ogaki, Japan.
6. Department of Embryology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Japan.