Evaluation of efficacy and efficiency of a pragmatic intervention by a social worker to support informal caregivers of elderly patients (The ICE Study): study protocol for a randomized controlled trial. - Pozet A; Lejeune C; Bonnet M; Dabakuyo S; Dion M; Fagnoni P; Gaimard M; Imbert G; Nerich V; Foubert A; Chotard M; Bonin M; et al. (Trials, 2016)