1 Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy; Corpo Nazionale Soccorso Alpino e Speleologico, National Medical School, Milan, Italy.
2 Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy.
3 Department of Anesthesiology and Intensive Care Medicine, Regional Hospital Treviso, Treviso, Italy; Helicopter Emergency Medical Services, Pieve di Cadore, Italy; Corpo Nazionale Soccorso Alpino e Speleologico, National Medical School, Milan, Italy.