“…Similarly, Cooper et al (2002) compared satisfaction among patients triaged by a Senior House Officer (SHO) with those triaged by ED nurses. Only three studies used random sampling methods to select participants (Chan & Chau, 2005;Chang et al, 1999;Cooper et al, 2002), while in the rest of the included studies the sample was chosen conveniently (Bruce et al, 1998;Davis & Duffy, 1999;Dinh et al, 2012a;Elder et al2004;George et al, 1992;Goransson & Rosen, 2010;Jennings et al, 2009;Mabrook & Dale, 1998;Moser et al, 2004;Rhee & Dermyer, 1995;Thrasher & Purc-Stephenson, 2008;Wilson & Shifaza, 2008). The sample selection strategy was not mentioned in three studies (Barr et al, 2000;Byrne et al, 2000;Topacoglu et al, 2004).…”