A Social Virtual Reality-Based Application for the Physical and Cognitive Training of the Elderly at Home oleh Sara Arlati, Vera Colombo, Daniele Spoladore, Luca Greci, Elisa Pedroli, Silvia Serino, Pietro Cipresso, Karine Goulene, Marco Stramba-Badiale, Giuseppe Riva, Andrea Gaggioli, Giancarlo Fserrigno, Marco Sacco