Gwyther, H., Bobrowicz-Campos, E., Apóstolo, J. L. A., Marcucci, M., Cano, A. & Holland, C. (2018). A realist review to understand the efficacy and outcomes of interventions designed to minimise, reverse or prevent the progression of frailty. Health Psychology Review, 12(4), 382?404. https://doi.org/10.1080/17437199.2018.1488601