RT Journal Article SR Electronic T1 Questions on ‘Sequencing of the MHC region defines HLA-DQA1 as the major genetic risk for seropositive rheumatoid arthritis in Han Chinese population’ by Guo et al JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP annrheumdis-2020-217031 DO 10.1136/annrheumdis-2020-217031 A1 Regueiro, Cristina A1 Gonzalez, Antonio YR 2020 UL http://ard.bmj.com/content/early/2020/02/05/annrheumdis-2020-217031.abstract AB