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APA Citation
Messer, K., Pierce, J. P., Zhu, S., Hartman, A. M., Al-Delaimy, W. K., Trinidad, D. R., & Gilpin, E. A. (2007). the California Tobacco Control Program's effect on adult smokers: (1) Smoking cessation. Tobacco control, 16(2), 85–90. http://access.bl.uk/ark:/81055/vdc_100137789020.0x000020