FP225DIFFERENCES IN EPIDEMIOLOGY AND PROGNOSIS OF ANCA ASSOCIATED VASCULITIS IN THE LAST THREE DECADES. (13th June 2019) - Piras, Doloretta; Caria, Stefania; Asunis, Anna; Masala, Marco; Scano, Valeria; Cao, Riccardo; Melis, Patrizia; Cabiddu, Gianfranca; Atzeni, Alice; Lepori, Nicola; Angioi, Andrea; Bianco, Paola; et al.