1. Department of Orthodontics, Showa University School of Dentistry, Tokyo, Japan
2. Japan Orthodontic Center, Tokyo, Japan
3. Department of Plastic and Reconstructive Surgery, Showa University School of Medicine, Tokyo, Japan
4. Department of Orthodontics and Pediatric Dentistry, University Center for Dental Medicine Basel, University of Basel, Switzerland
5. Department of Oral and Craniomaxillofacial Surgery, University Hospital Basel, Switzerland