1Department of Orthopedic Trauma, SS Annunziata Hospital, Savigliano, CN Italy
2Sant’Anna Clinic, Casale Monferrato, AL Italy
3Eporediese Hospital, Ivrea, TO Italy
4La Vialarda Clinic, Biella, Italy
5Sestri Ponente Hospital, Genova, Italy
6Department of Orthopedics and Traumatology, IRCCS A.O.U. San Martino-IST, Genova, Italy
7Department of Orthopedics and Traumatology, AO CTO Hospital, Turin, Italy
8Santa Rita Clinic, Vercelli, Italy
9Via Servais 200 A 16, Turin, Italy
© The Author(s) 2016
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