1. Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
2. Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
3. Research Center for Evidence-Based Medicine (RCEBM), Tabriz University of Medical Sciences, Tabriz, Iran
4. Tabriz Health Services Management Research Center, Tabriz University of Medical Sciences, Tabriz, Iran