Institution: | (1) Fourth Surgery Department, National University of Athens, 'Attikon' University General Hospital, 1 Rimini Street, 124 62 Athens, Greece;(2) Department of Medical Informatics, General Hospital of Nikaias Piraeus, 3 Maduvalou Street, 18454 Nikaias, Piraeus, Greece;(3) Department of Statistics, Athens University of Economics and Business, 76 Patission Avenue, 104 34 Athens, Greece |