Note: Effect size of zero indicates no effect. The effect sizes were estimated from meta analyses: ; A = Shavelle, Paculdo, Strauss, and Kush, 2008 ; B = Critchley and Capewell, 2003 ; C = Holman, English, Milne, and Winter, 1996 ; D = Fine, Smith, Carson, Meffe, Sankey, Weissfeld, Detsky, and Kapoor, 1994 ; E = Taylor, Brown, Ebrahim, Jollife, Noorani, Rees et al., 2004 ; F, G = Katzmarzyk, Janssen, and Ardern, 2003 ; H = Insua, Sacks, Lau, Lau, Reitman, Pagano, and Chalmers, 1994 ; I = Schwartz, 1994 .