Reference:
Richards DA, Bower P, Pagel C, Weaver A, Utley M, Cape J, Pilling S, Lovell K, Gilbody S, Leibowitz J, Owens L, Paxton R, Hennessy S, Simpson A, Gallivan S, Tomson D, Vasilakis C. Delivering stepped care: an analysis of implementation in routine practice. Implementation Science 2012;7: 3.