Affiliation: | 1.Department of Computer and Systems Sciences, Stockholm University, Borgarfjordsgatan 12, 164 55, Kista, Sweden ;2.Department of Informatics, Athens University of Economics and Business, Patission 76, 104 34, Athens, Greece ;3.Nuclear Medicine Department, Medical Diagnostic Center Kosmoiatriki, Patission 237, 112 54, Athens, Greece ; |