Steven J. Ondersma, Grace Chang, Tiffany Blake‐Lamb, Kathryn Gilstad‐Hayden, John Orav, Jessica R. Beatty, Gregory L. Goyert, Kimberly A. Yonkers (21 June 2019) ‘Accuracy of five self-report screening instruments for substance use in pregnancy‘. Findings: Performance of all instruments varied significantly with race, site and economic status. Addiction