1 Department of Translational Medical Sciences, Federico II University and R&D, Federico II University Hospital, Italy.
2 Roessingh Research and Development, Telemedicine Group, Enschede, Netherlands ; University of Twente, Faculty of Electrical Engineering, Mathematics and Computer Science, Telemedicine Group, Enschede, Netherlands.
3 Centre for Gerontology and Rehabilitation, St. Finbarr's Hospital, University College Cork, Ireland.
4 CIRFF, Center of Pharmacoeconomics, Federico II University, Naples, Italy.
5 Department of Medicine and Surgery, University of Salerno, Salerno, Italy.
6 Department of Computing Science, Umeå University, Sweden.