Exploring the factors that influence engagement with and experiences of integrated care for adults at risk of cardiovascular disease and mild-to-moderate mental health concerns in the UK (OptICS): a systematic review protocol. - McKinlay, Alison R.; Howlett, Neil; Antonopoulou, Vivi; Lorencatto, Fabiana; McGowan, Laura J.; Osborn, David; O'Donnell, Amy; Oliver, Emily J.; Vlaev, Ivo; Sniehotta, Falko F.; Kelly, Michael P.; Michie, Susan; et al. (Systematic Reviews, 2025)