The Lancet RheumatologyVolume 2, Issue 11, November 2020, Pages e650-e652CommentThe contribution of the observational research design to COVID-19 researchAuthor links open overlay panelAlfred H J Kim a, Seth A Eisen aShow moreShareCitehttps://doi.org/10.1016/S2665-9913(20)30336-2Get rights and contentPrevious article in issueNext article in issueRecommended articlesCited by (0)View Abstract© 2020 Elsevier Ltd. All rights reserved.