1. Department of Medical and Surgical Sciences; University of Bologna; Bologna Italy
2. Red Cross College of Nursing; Chung-Ang University; 84 Heukseok-Ro; Dongjack-Gu; Seoul 156-756 Republic of Korea
3. Department of Nursing; Hallym Polytechnic University; Chuncheon Republic of Korea
4. Nursing, Technical and Rehabilitation Assistance Service; Rizzoli Orthopedic Institute; Bologna Italy