Mapping the evidence for patient and public involvement and engagement in statistical methodology research: A scoping review protocol. - Bradbury, Naomi V.; Roberts, Julie; Lock, Selina; Haddon, Louise; Begum, Samina; Goulao, Beatriz; Mackintosh, Nicola; Newby, Chris; O'Reilly, Michelle; Gray, Laura J. (PLoS ONE, 2025)