1 Department of Cardiology, San Luca Hospital, Istituto Auxologico Italiano, IRCCS, Milan, Italy.
2 Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy.
3 Eurac Research, Institute of Mountain Emergency Medicine, Bolzano, Italy.
4 Laboratorio de Fisiología Comparada/Laboratorio de Fisiología del Transporte de Oxígeno, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru.