1. Department ‘Scuola Medica Salernitana’, University of Salerno, Baronissi, Italy
2. Unit of Nephrology and Hypertension, University Hospital, Salerno, Italy
3. Rummo Hospital, Benevento, Italy
4. Department of Physics, University of Salerno, Fisciano (SA), Italy
5. Centro Studi Epidemiologici di Gubbio, Gubbio, Italy
6. Istituto Auxologico Italiano, University of Milan, Milan, Italy