155. IMPROVED SURVIVAL IN PATIENTS WITH ANTI-NEUTROPHIL CYTOPLASMIC ANTIBODY-ASSOCIATED VASCULITIS (AAV) DURING THE YEARS 2000 TO 2015 - A DANISH NATIONWIDE STUDY. (29th March 2019) - Nelveg-Kristensen, Karl Emil; Szpirt, Wladimir; Carlson, Nicholas; Gregersen, Jon; Krarup, Elizabeth; Ivarsen, Per; Torp-Pedersen, Christian; Egfjord, Martin