1. Pharmaceuticals and Medical Devices Agency, Japan Post-marketing Safety:Outline http://www.pmda.go.jp/english/about/pdf/profile_of_services.pdf
2. Pharmaceuticals and Medical Devices Agency, Japan Post-marketing Safety:Safety Information http://www.pmda.go.jp/english/service/safety_info.html
3. Pharmaceuticals and Medical Devices Agency, Japan The Yellow Letter/Blue Letter http://www.pmda.go.jp/english/service/letter.html
4. Pharmaceuticals and Medical Devices Agency, Japan Pharmaceuticals and Medical Devices Safety Information http://www.pmda.go.jp/english/service/precautions.html
5. Contraindicated medications dispensed with cisapride: temporal trends in relation to the sending of ‘Dear Doctor’ letters;Weatherby;Pharmacoepidemiol Drug Saf,2001