“…Attrition and recruitment problems were described in five of the studies (Hesse, Holmes, Kennedy-Overfelt, Kerr, & Giles, 2015;Jastrowski Mano et al, 2013;Lovas et al, 2017;Ruskin, Gagnon, Kohut, Stinson, & Walker, 2017;Ruskin, Kohut, & Stinson, 2015) as well as problems with obtaining sufficient post test data to draw valid conclusion about outcome (Ruskin, Gagnon, Kohut, Stinson, & Walker, 2017). However, three other recent studies indicate better feasibility results with low attrition and high acceptability but heterogeneous results when it comes to potential efficacy (Ali et al, 2017;Chadi et al, 2016;Waelde et al, 2017).…”