RT Journal Article SR Electronic T1 Conducting umbrella reviews JF BMJ Medicine JO bmjmed FD BMJ Publishing Group Ltd SP e000071 DO 10.1136/bmjmed-2021-000071 VO 1 IS 1 A1 Lazaros Belbasis A1 Vanesa Bellou A1 John P A Ioannidis YR 2022 UL http://bmjmedicine.bmj.com/content/1/1/e000071.abstract AB In this article, Lazaros Belbasis and colleagues explain the rationale for umbrella reviews and the key steps involved in conducting an umbrella review, using a working example.Data sharing not applicable as no datasets generated and/or analysed for this study.