1. From Regional Healthcare Information Organizations to a National Healthcare Information Infrastructure;Kaufman;Perspect. Health Inform. Manage.,2005
2. Center for Information Technology Leadership. http://www.citl.org/.
3. IT Strategic Headquarters. http://www.kantei.go.jp/foreign/policy/it/index_e.html.
4. Ministry of Health, Labour and Welfare, 2002 Survey of Medical Care Institutions. http://www.mhlw.go.jp/toukei/saikin/hw/iryosd/02/index.html (in Japanese).
5. Healthcare Information Systems Examination Committee, Grand Design for the Development of Information Systems in the Healthcare and Medical Fields. http://www.mhlw.go.jp/shingi/0112/s1226-1a.html (in Japanese).