1. “San Giovanni Battista” Hospital; Foligno Perugia Italy
2. Department of Surgery; School of Medicine; University of Perugia; Perugia Italy
3. Division of Internal and Cardiovascular Medicine and Stroke Unit; Department of Internal Medicine; School of Medicine; University of Perugia; Perugia Italy
4. “Bellinzona e Valli” Regional Hospital; Bellinzona Switzerland