To acknowledge this checklist in your methods, please state "We used the CONSORT-SPI
when writing our report [citation]". Then cite this checklist as Montgomery P, Grant S, Mayo-Wilson E, Macdonald G, Michie S, Hopewell S, Moher D; on behalf of the CONSORT-SPI Group. Reporting randomised trials of social and psychological interventions: the CONSORT-SPI 2018 Extension. Trials. 2018;19:407..