FP659IONIZING RADIATION EXPOSURE FROM DIALYSIS CENTRAL VENOUS ACCESS PROCEDURES. (13th June 2019) - De Mauri, Andreana; Matheoud, Roberta; Guzzardi, Giuseppe; Vaccarone, Valentina; Brambilla, Marco; Gravellone, Luciana; Izzo, Cristina; Capurro, Federica; Chiarinotti, Doriana