1. San Raffaele Hospital; Unit of Functional Recovery; Via Olgettina, 48 Milan Italy 20132
2. IRCCS Galeazzi Orthopaedic Institute; Unit of Clinical Epidemiology; Milan Italy
3. University of Milan; Department of Biomedical Sciences for Health; Via Pascal 36 Milan Italy 20133
4. University Vita-Salute San Raffaele; School of Physiotherapy; Via Olgettina, 58 Milan Italy 20132