Kahan, Brennan CJuszczak, EdmundBeller, ElaineBirchenall, MeganChan, An-WenHall, SophieLittle, PaulFletcher, JohnGolub, Robert MGoulao, BeatrizHopewell, SallyIslam, NazrulZwarenstein, MerrickElbourne, Diana R.Montgomery , Alan2025-02-062025-02-062025-02Kahan, B C, Juszczak, E, Beller, E, Birchenall, M, Chan, A-W, Hall, S, Little, P, Fletcher, J, Golub, R M, Goulao, B, Hopewell, S, Islam, N, Zwarenstein, M, Elbourne, D R & Montgomery , A 2025, 'Guidance for protocol content and reporting of factorial randomised trials : explanation and elaboration of the CONSORT 2010 and SPIRIT 2013 extensions', British Medical Journal, vol. 388, e080785. https://doi.org/10.1136/bmj-2024-0807850959-8146https://hdl.handle.net/2164/25003We thank and acknowledge the contributions of all members of the Delphi study: Aaron Orkin, Aiping Lyu, Angela Fidler Pfammatter, Ben Cromarty, Catherine Hewitt, Christine Bond, Christopher Partlett, Christopher Schmid, Claire L Chan, David Moher, Derrick Bennett, Elizabeth George, Evan Mayo-Wilson, Giovannino Ciccone, Graeme S MacLennan, Halvor Sommerfelt, Hams Hamed, Helen Dakin, Himanshu Popat, Ian White, Jay Park, Jennifer Nicholas, Jonathan Emberson, Joseph C. Cappelleri, Julia Edwards, Julien Vos, Kath Starr, Kerry Dwan, Lee Middleton, Lehana Thabane, Lori Frank, Madelon van Wely, Marie-Joe Nemnom, Mark Hull, Martha Alejandra Morales-Sanchez, Martin Law, Martyn Lewis, Michael Forstner, Mike Bradburn, Monica Taljaard, Munya Dimairo, Nick Freemantle, Nuria Porta, Nurulamin Noor, Olalekan Lee Aiyegbusi, Patricia Logullo, Philip Pallmann, Ranjit Lall, Reuben Ogollah, Richard Haynes, Richard L Kravitz, Robert Platt, Sarah Pirrie, Sharon Love, Shaun Treweek, Siobhan Creanor, Sunita Vohra, Susan Dutton, Suzie Cro, Tianjing Li, Tim Morris, Timothy Collier, Trish Hepburn, Vivian A Welch, William Tarnow-Mordi, and Yolanda Barbachano.21577814engR Medicine (General)R1Journal article10.1136/bmj-2024-080785388