1. Nephrology and Dialysis Unit; Department of Clinic and Molecular Medicine; Faculty of Medicine and Psychology; University of Rome “Sapienza”; Sant'Andrea Hospital; Rome Italy
2. Department of Emergency Surgery; Faculty of Medicine and Psychology; University of Rome “Sapienza”; Sant'Andrea Hospital; Rome Italy
3. Department of Pathological Anatomy; Faculty of Medicine and Psychology; University of Rome “Sapienza”; Sant'Andrea Hospital; Rome Italy
4. Dermatology Unit; NESMOS Department; University of Rome “Sapienza”; Sant'Andrea Hospital; Rome Italy
5. Department of Dermatology; School of Medicine; University of Maryland Baltimore; Baltimore MD USA