Effectiveness of a fourth dose of COVID-19 mRNA vaccine in patients with systemic autoimmune rheumatic diseases using disease-modifying antirheumatic drugs: an emulated target trial

https://www.thelancet.com/journals/lanrhe/article/PIIS2665-9913(23)00272-2/fulltext?dgcid=hubspot_update_feature_updatealerts_lanrhe&utm_campaign=update-lanrhe&utm_medium=email&_hsmi=288624173&_hsenc=p2ANqtz--qJWSBLdRsNVTzngEv_LCZyC3rboEFCJn__m6vvWzucJQRpFuRlMopKWIuqhF5VKtbIqFeyG7UEAuEhuSnAj_nPZBqdA&utm_content=288125594&utm_source=hs_email