McCarthy, edMegan, O'Keeffe, Linda, Williamson, Paula R., Sydes, Matthew R., Farrin, Amanda, Lugg-Widger, Fiona, Davies, Gwyneth, Avery, Kerry, Chan, An-Wen, Kwakkenbos, Linda, Thombs, Brett D., Watkins, Alan, Hemkens, Lars G., Gale, Chris, Zwarenstein, Merrick, Langan, Sinead M., Thabane, Lehana, Juszczak, Edmund, Moher, David, Kearney, Patricia M., "A study protocol for the development of a SPIRIT extension for trials conducted using cohorts and routinely collected data (SPIRIT-ROUTINE) [version 1; peer review: awaiting peer review]", HRB Open Research, 2021