“…We identified 15 articles meeting inclusion criteria using the search strategy (Harmon et al, 1995;Forrester and Merz, 2000;Waller et al, 2000;Olde Scholtenhuis et al, 2003;Biggio et al, 2004;Garne et al, 2005;Ghi et al, 2006;Nikkila et al, 2006;Tairou et al, 2006;Poretti et al, 2008;Aguilera et al, 2009;Amari et al, 2010;Lu et al, 2011;Machado et al, 2012). One additional article was found using Google Scholar (this article had cited one of the articles identified using the search strategy) (Adama van and one article was known to the authors and included (Shulman et al, 1994).…”