“…The majority of studies looking at participant experiences and perspectives (including process evaluations) (Barron and Abdullah, 2012;Walstrom et al, 2012;Richters et al, 2013;Eyber et al, 2014;Hogwood et al, 2014;Lilley et al, 2014;McBain et al, 2015;Schafer et al, 2015;Aldersey et al, 2016;Eiling et al, 2016;El-Khani et al, 2016;Hechanova et al, 2016;Hugelius et al, 2016;Asghar et al, 2018;Tol et al, 2018b;Greene et al, 2019;King, 2019;Koegler et al, 2019;Ordóñez-Carabaño et al, 2019;Sullivan et al, 2019) Rahman et al, 2016;Hallman et al, 2018;Khan et al, 2017;Tol et al, 2018b;Sijbrandij et al, 2020;Tol et al, 2020aTol et al, , 2020b, there was a predominance towards a low risk of bias for each of the domains scored, except for allocation concealment, blinding of participants and personnel, and allocation concealment, which were more 'unclear'. There was a much higher risk of bias and a greater lack of clarity amongst the 12 controlled before-and-after studies (Ager et al, 2011;Sonderegger et al, 2011;Morris et al, 2012;Jordans et al, 2013;Mpande et al, 2013;Mercy Corps, 2015;Uyun and Witruk, 2017;Akiyama et al, 2018;Veronese and Barola, 2018;Metzler et al, 2019aMetzler et al, , 2019b…”