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Cigarettes are back in vogue

Start with your lifestyle, not the hype

only a significant correlation between the IV and the exposure justifies its use as a proxy in MR analysis

You can see the states with the highest cotinine positivity rates on this map with Ohio, Kentucky, Indiana, Arkansas and Mississippi being among the five highest

(2010), Impact of non-smoking ordinances on hospitality revenues: The case of Germany, in Journal of Economics and Statistics, 230(5), 506521

Jin, L., Richardson, A., Lynch, J., Lorkiewicz, P., Srivastava, S., Fryar, L., Miller, A., Theis, W., Shirk, G., Bhatnagar, A., Srivastava, S., Riggs, D