Faculty of Economics, University of Catania, Corso Italia, 55, Catania, Italy;Graduate School of Engineering, Department of Electrical Engineering and Computer Sciences, University of Hyogo, 2167 Shosha, Himeji, Hyogo, Japan;Department of Medical Informatics, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, Shimane, Hyogo, Japan;Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3, Machikaneyama, Toyonaka, Osaka, Hyogo, Japan;Department of Risk Engineering, School of Systems and Information Engineering, University of Tsukuba, 1-3, Machikaneyama, Toyonaka, Ibaraki, Hyogo, Japan