TY - RPRT TI - Risk factors associated with loss of hepatitis B virus surface antibody in patients with HBV surface-antigen negative/surface antibody positive serostatus receiving biologic DMARDs to treat rheumatic diseases - a nested case-control study AU - Hung, M.-H. AU - Tien, Y.-C. AU - Chiu, Y.-M. PY - 2019 DO - 10.1101/661850 UR - https://www.biorxiv.org/content/10.1101/661850v1 ID - 10.1101/661850 ER -