17.
Assessing tobacco use in an African population: Serum and urine cotinine cut-offs from South Africa
Lisa J. Ware, Karen Charlton, Ruan Kruger, Yolandi Breet, Johannes van Rooyen, Hugo Huisman, Shani Botha, Aletta S. Uys, Kirsten L. Rennie, Nirmala Naidoo, Paul Kowal, Aletta E. Schutte
Drug and Alcohol Dependence