Dr. Behrouz Ziad Alizadeh professor of Genetic Epidemiology & Bioinformatics from the University Medical Center Groningen (UMCG) of Netherlands visited Tabriz University of Medical Sciences (TUOMS) from 26 December 2016 to 3 January 2017 and held two workshops on "Causal Inference from Observational Study-Mendelian Randomization" and "Research Methodology".