1. Department of Biomedical, Surgical and Dental Sciences, IRCCS Istituto Ortopedico Galeazzi, University of Milan, Milan, Italy
2. UOC Neurology, Clinical Neurophysiology, Besta Institute Foundation IRCCS, Milan, Italy
3. Italian Association for Metals and Biocompatibility Research – A.I.R.M.E.B., Milan, Italy