1. Pharmaceuticals and Medical Devices Agency (PMDA). Japan. Available at: http://www.info.pmda.go.jp/.
2. Health and Welfare Statistics Association, ed. Pharmaceuticals: Annual Statistical Report of National Health Conditions. Japan; 2006:233–262.
3. Morikawa K, Onodera R, Yamamoto M. International comparative study forwards proper use of medicines: investigational study regarding construction and dissemination of database for EBM. Report of Research on Health Technology Assessment. Health and Labor Sciences Research Grants. 2003; 139–174.
4. Miyamoto A, ed. The Guidelines for the Diagnosis and Management of Asthma. Japan: Ministry of Health and Labour and Welfare Special Re search; 2004.
5. Ministry of Health, Labour and Welfare (MHLW). Japan. Available at: http://www.mhlw.go.jp/.