“…These effects of mother's lifetime smoking likely capture a variety of environmental factors, for example exposure to secondhand smoke, which increases the risk of ND (Belanger et al, 2008;Okoli, Richardson, Ratner, & Johnson, 2009), behavioral modeling (Kalesan et al, 2006;Pedersen & Lavik, 1991), parental views of smoking (Banks et al, 1981;Flay et al, 1994;Nolte et al, 1983), and perceived availability of cigarettes (Doubeni et al, 2008;Doubeni, Li, Fouayzi, & DiFranza, 2009;Woodruff et al, 2003). Additionally, mother's lifetime smoking may transmit separate genetic risks than does MSP, since specific genetic factors influence different aspects of smoking independently (Maes et al, 2004).…”