[文献書誌] Harada K., Ishii Y., Ishii M., Imaizumi H., Mibu M., Omura K.: "Effect of maxillary distraction osteogenesis on velopharyngealfunction : a pilot study"Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, & Endodontics. 93(5). 538-543 (2002)