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Assessing tobacco use in an African population: serum and urine cotinine cut-offs from South Africa
- Ware, Lisa J., Charlton, Karen, Kruger, Ruan, Breet, Yolandi, Van Rooyen, Johannes, Huisman, Hugo, Botha, Shani, Uys, Aletta S., Rennie, Kirsten L., Naidoo, Nirmala, Kowal, Paul, Schutte, Aletta E.
- Gilligan, Conor, Sanson-Fisher, Robert, Eades, Sandra, Wenitong, Mark, Panaretto, Kathryn, D'Este, Catherine
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