“…Our searches identified 189 potentially relevant studies, of which 41 full text reports were examined ( Figure 1). A total of 18 studies met the eligibility criteria ( Figure 1) (Andersen, Duriaud, Aasvang, & Kehlet, 2016;Andriamamonjy, Delmotte, Savinelli, Beaussier, & Coudore, 2017;Attal et al, 2009;Binder et al, 2007;Boyette-Davis et al, 2013, 2011aCaraceni et al, 2008;Cata et al, 2007;Dougherty, Cata, Burton, Vu, & Weng, 2007;Dougherty, Cata, Cordella, Burton, & Weng, 2004;Fallon et al, 2015;Forsyth et al, 1997;Hershman et al, 2011;Krøigård et al & Fallon, 2012;Velasco et al, 2015;Ventzel et al, 2017). Three studies included patients with tumour-related cancer pain (Andersen et al, 2016;Lipton et al, 1991;Scott et al, 2012).…”