Retrospective study of 919 RTX-treated GPA pts shows TMP-SMX prophylaxis (given to 31%) assoc w/ reduced serious infections (adj HR 0.5) and less outpatient infections (aHR 0.8). All 13 pneumocystis infx (PJP) occured in those not Rx w/ TMP-SMX. https://t.co/bO6oAHv7Lr https://t.co/fPntW75hnY