• National Health Insurance Service
• U.S. department of health & human services
• U.S.national health institute
• U.S.food and drug administration
• U.S.center for disease control and prevention
• Agency for Healthcare Research and Quality
• American medical association
• American pharmaceutical association
• U.S.national library of medicine
• Japan, ministry of health, Labour and welfare
• England,department of health
• Health Canada online
• Australian institute of health and welfare
• Today on Medscape