“…Seventy-two abstracts were retrieved after removing repeated abstracts, review articles and abstracts not related to the topic. Upon application of inclusion criteria (e.g., efficiency, costeffectiveness, output purity), a total of 28 articles were fully examined and twenty-one studies were finally selected for use in our evidencebased methodology (Andrews et al, 2000;Baldock and Short, 2000;Cow-perthwaite et al, 1980;Diaz et al, 2001;Ferracin et al, 2002;Frias et al, 2002;Agrawal et al, 2004;Rabah, 1998;Ramus and Hawkins, 1993;Reddy, 2003;Raghavan et al, 2000;Tianjun and Qichang, 1999;Errington et al, 2005;Arthur and Edwards, 2003;Zhang et al, 2008;Ziebik and Stanek, 2006;Barakat, 1998;Ettler et al, 2005;Ryzhenkov et al, 2006;Socolow and Thomas, 1997;Yender, 1998).…”