“…Risk of bias of the included studies ranged from 30% to 90%: a high risk of bias was found for seven studies (Ahmed et al, 2008; Fu et al, 2018; Kopec et al, 2013; Kosir et al, 2001; Morris et al, 2017; Ridner & Dietrich, 2015; Ridner et al, 2011), a moderate risk of bias for 13 studies (Armer et al, 2003; Bani et al, 2007; Finlay et al, 2013; Flores et al, 2020; Gartner et al, 2010; Gençay Can et al, 2019; Hidding et al, 2019; Honarvar et al, 2016; Mak et al, 2009; Norman et al, 2009; Ridner et al, 2007; Sierla et al, 2013; Suehiro et al, 2019), and a low risk for bias for nine studies (Armer, Ballman, McCall, Armer, et al, 2019; Armer, Ballman, McCall, Ostby, et al, 2019; Armer & Fu, 2005; Brunelle et al, 2020; Bundred et al, 2020; Cidon et al, 2011; Fu et al, 2015; Hayes et al, 2008; Korucu et al, 2020; Svensson et al, 2020; Table 1). Based on the 2005 classification system of the Dutch Institute for Healthcare Improvement, the level of evidence was determined to be “B” for 17 studies with a comparative design (Ahmed et al, 2008; Armer, Ballman, McCall, Armer, et al, 2019; Armer, Ballman, McCall, Ostby, et al, 2019; Armer & Fu, 2005; Armer et al, 2003; Bani et al, 2007; Brunelle et al, 2020; Bundred et al, 2020; Flores et al, 2020; Fu et al, 2015, 2018; Honarvar et al, 2016; Korucu et al, 2020; Mak et al, 2009; Norman et al, 2009; Ridner et al, 2007; Sierla et al, 2013; Svensson et al, 2020) and “C” for 12 non‐comparative studies (Cidon et al, 2011; Finlay et al, 2013; Gartner et al, 2010; Gençay Can e...…”