1 Division of Dermatology, Department of Internal Medicine, Geriatric Diseases and Nephrology, Bologna, ItalyDivision of Dermatology, Department of Internal Medicine, Geriatrics and Nephrology, Bologna, ItalyHeamatopathology Section, Sant'Orsola - Malpighi Hospital, BolognaDivision of Dermatology, Department of Internal Medicine, Geriatrics and Nephrology, Bologna, ItalyDivision of Dermatology, Department of Internal Medicine, Geriatrics and Nephrology, Bologna, ItalyDivision of Dermatology, Department of Internal Medicine, Geriatrics and Nephrology, Bologna, ItalyDivision of Dermatology, Department of Internal Medicine, Geriatrics and Nephrology, Bologna Italy. [email protected].