9/2008-3/09 Clinical Research Fellow, Clinical Enteric Neuroscience Translational § Epidemiological Research, Mayo Clinic, Rochester MN, ΗΠΑ, Prof. Dr. Michael Camilleri.
4/2010-6/11 Clinical Research Fellow, Translational Research Center for Gastrointestinal Research (TARGID), University Hospital Gasthuisberg, University of Leuven, Belgium, Prof. Dr. Jan Tack.