KRT88P and rheumatoid arthritis: In previous studies, HBr was seen in 1 patient among 64 HBsAg-negative and anti-HBc IgG-positive RA patients using tocilizumab.7 Also, 1 HBr was seen in 25 RA patients in another study.9 Besides this, there was no HBr with tocilizumab exposure in the other 2 studies.8,17 In that 2 studies, no HBr was seen with tofacitinib.8,18 In our cohort, 16 patients were exposed to tocilizumab and 10 patients were exposed to tofacitinib, and there was no HBr among these patients.