1 Division of Internal Medicine and Sport Cardiology. Media Valle del Tevere Hospital, Todi, Umbria, Italy; Umbria Covid Hospital, Todi, Umbria, Italy. Electronic address: ugo.paliani@uslumbria1.it.
2 Division of Internal Medicine and Sport Cardiology. Media Valle del Tevere Hospital, Todi, Umbria, Italy; Umbria Covid Hospital, Todi, Umbria, Italy; Division of Cardiovascular Medicine - Department of Internal Medicine, The Ohio State University, Columbus, OH, USA.
3 Department of Internal Medicine, Division of Statistics, Perugia Hospital, Italy.
4 Division of Internal Medicine and Sport Cardiology. Media Valle del Tevere Hospital, Todi, Umbria, Italy; Umbria Covid Hospital, Todi, Umbria, Italy.