1. Renal Research Institute , New York, NY , USA
2. Institute of Molecular Biology and Genetics (Biogem) , Ariano Irpino , Italy
3. Associazione Ipertensione Nefrologia Trapianto Renal (IPNET), c/o Nefrologia, Grande Ospedale Metropolitano , Reggio Calabria , Italy
4. Nephrology Unit Portoferraio Hospital (Livorno) , Italy
5. Clinical Epidemiology Unit, Centro di Fiisologia Clinica CNR , Reggio Cal , Italy
6. Division of Nephrology and Transplantation , Grande Ospedale Metropolitano Reggio Calabria , Italy