Welcome, Professor John M. O’Donnell from The Winter Institute of Simulation Research (WISER), University of Pittsburgh, USA, to serve as Siriraj visiting scholar at Department of Emergency Medicine from January 29 – February 5, 2018. On this occasion, Professor O’Donnell also held simulation workshops on “Panel discussion for simulation research” on January 31, 2018, and “Simulation for Medical Education Assessment” on February 1-2, 2018.