Development of <i>C</i> ore <i>O</i> utcome <i>S</i> ets for trials on the management of <i>A</i> trial fi <i>B</i> rill <i>A</i> tion in <i>C</i> ritically <i>U</i> nwell patient <i>S</i> (COS-ABACUS): a protocol

The study has been approved by the University of Liverpool ethics committee (Ref: 11 256, 21 June 2022), with a formal consent waiver and assumed consent. We will disseminate the finalised COS via national and international critical care organisations and publication in peer-reviewed journals.