Sprange, K., Mountain, G. A., Brazier, J., Cook, S. P., Craig, C., Hind, D., …Horner, K. (2013). Lifestyle matters for maintenance of health and wellbeing in people aged 65 years and over: study protocol for a randomised controlled trial. Trials, 14, Article 302. https://doi.org/10.1186/1745-6215-14-302