Worked with Dr. Dulucq at Institute of Laparoscopic Surgery, Boadeaux, France. Worked with Prof. Stefan Post at Mannheim University Clinic, University of Heidelberg, Germany on Pancreatic Surgery. Worked with Prof. Peter Nuhauz at Humbolts University, Berlin, Germany, for organ transplantations, visceral and bile duct surgery. Worked with Prof. Dinemann at Thorax Clinic, Heidelberg, Germany on all kinds of lung surgery and VATS. Visited Osaka Medical College, Department of General and GL Surgery with Prof. Nobuhoko in 2002 and worked hands-on with the team.