1. JDS (Japan Down Syndrome Society) HP, http://www.jdss.or.jp/.
2. The relation between Metabolism, Obesity and Exercise in Mentally Retarded Children;Tsuchiya;Academic Knowledge Archives of Gunma Institutes,2004
3. Treatment for Planovalgus Foot in Children, Comparison between Children with Down's Syndrome and others;Tawada;Journal of Japanese Paediatric Orthopaedic Association,2004
4. Foot and big toe deformities in children with Down syndrome: Planovalgus, Metatarsus Primus Varus and Hallux Valgus;Yamamoto;Journal of Japanese Paediatric Orthopaedic Association,2006
5. Andou E., Nara Prefectural Medical College, The simple radiographic technique that we want to know now, Japanese Society of Radiological Technology Kinki Branch Magazine 14-3 (2011).