“…Low quality: it very likely that future studies change our confidence in the estimate of effect, therefore our confidence is low. Table. 2001; Elder, 1996;Finan, 2006;Zacks, 2002;Collet, 1997;Ibrahim, 2006;Weber, 2003;Feldman, 1994;Perez Lara, 2006;Sungler, 2000;Daradkeh, 1999;Ji, 2005;Fernandes, 2000;Palanivelu, 2006;da Silveira, 2006;Gurusamy, 2006;Chandler, 2000;Kiviluoto, 1998;Glavic, 2001;Eldar, 1998;Lujan, 1995;Tan, 2006;Perez-Morales, 2005;Bagia, 2001;Schafer, 2003;Kwon, 2001;Woods, 1996).…”