RT Journal Article SR Electronic T1 Mild COVID-19 despite inadequate antibody response after repeated vaccinations in rheumatic disease patients with rituximab-induced B cell depletion: a case series JF RMD Open JO RMD Open FD EULAR SP e002567 DO 10.1136/rmdopen-2022-002567 VO 8 IS 2 A1 Alexander ten Hagen A1 Elisa Habermann A1 Sandra Hermann A1 Gerd R Burmester A1 Robert Biesen A1 Fredrik N. Albach YR 2022 UL http://rmdopen.bmj.com/content/8/2/e002567.abstract AB