Post-ROSC peripheral perfusion index and 30 days survival after out-of-hospital cardiac arrest. Our four years experience. (September 2019) - Savastano, Simone; Baldi, Enrico; Fracchia, Rosa; Cacciatore, Elisa; Compagnoni, Sara; Palo, Alessandra; Contri, Enrico; Iotti, Giorgio; Visconti, Luigi Oltrona