Barriers and enablers to the implementation of the 6-pack falls prevention program: a pre-implementation study in hospitals participating in a cluster randomised controlled trial D. Ayton, A. Barker, R. Morello, C. Brand, J. Talevski, F. Landgren, M. Melhem, E. Bian, S. Brauer, K. Hill, P. Livingston, M. Botti 2017 / Vol. 12, pp. 1 - 13 / Plos one