1. Centro Chirurgico St. Anna, Merano, Italy
2. Ospedale Generale Brunico, Department of Orthopedics and Traumatology, Brunico, Italy
3. Ospedale Tappeiner, Department of Orthopedics and Traumatology, Merano, Italy
4. Ospedale Tappeiner, Department of Rehabilitation, Merano, Italy
5. Ospedale Tappeiner, Department of Orthopedics and Traumatology, Merano, Italy.