RT Article T1 Factors associated with substance use during pregnancy: Results from a national sample JF Drug and alcohol dependence VO 99 IS 1-3 SP 89 OP 95 A1 Havens, Jennifer R. A1 Hansen, Wendy F. A1 Shannon, Lisa A1 Simmons, Leigh Ann A2 Hansen, Wendy F. A2 Shannon, Lisa A2 Simmons, Leigh Ann LA English YR 2009 UL https://krimdok.uni-tuebingen.de/Record/1912554143 DO 10.1016/j.drugalcdep.2008.07.010