1. School of Nursing, Department of Clinical and Biological Science, University of Torino, Via San Giacomo 2, Beinasco, 10092 Torino, Italy
2. General Surgery, Hospital Evangelico Valdese, Via Pellico 19, 10135 Torino, Italy
3. General Surgery, Hospital Ospedale Umberto I, Via Magellano N.1, 10128 Torino, Italy
4. Department of Clinical and Biological Science, University of Torino, Via Santena 5bis, 10126 Torino, Italy
5. Department of Public Health and Paediatrics, University of Torino, Via Santena 5bis, 10126 Turin, Italy