1. Nephrology and Dialysis Unit, Department of Medicine, S. Salvatore Hospital, L’Aquila, Italy
2. Department of Life, Health, and Environmental Sciences, University of L’Aquila, S. Salvatore Hospital, Italy
3. Infection Diseases Unit, Department of Medicine, SS Filippo e Nicola Hospital, Avezzano, Italy
4. Nephrology and Dialysis Unit, Department of Medicine, G. d’Annunzio University of Chieti-Pescara, SS. Annunziata Hospital, Chieti, Italy