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1 Department of Medicine and Surgery, Section of Internal and Cardiovascular Medicine, University of Perugia, Perugia, Italy.
2 Department of Internal and Specialized Medicine USL South-East Tuscany, Division of Internal Medicine, Ospedale della Valdichiana 'S Margherita', Cortona, Italy.
1 Department of Medicine and Surgery, Section of Internal and Cardiovascular Medicine, University of Perugia, Perugia, Italy.
2 Department of Internal and Specialized Medicine USL South-East Tuscany, Division of Internal Medicine, Ospedale della Valdichiana 'S Margherita', Cortona, Italy.