Complex intervention programme to improve patient safety and facilitate deprescribing in frail older patients living at home (COFRAIL): A process evaluation of a cluster randomised controlled trial. - Abraham J; Fleischer S; Mortsiefer A; Drewelow E; Ritzke M; Wiese B; Dintsios CM; Bencheva V; Thürmann P; Wilm S; Meyer G (PloS one, 2026)