http://www.livescience.com/8848-true-cost-smoking-150-pack.html
http://mitpress.mit.edu/books/price-smoking
http://www.sciencedirect.com/science/article/pii/S0167629611000828
http://www.nejm.org/doi/full/10.1056/NEJM199802123380713
Impact of Medicare Advantage on skilled nursing facility profitability
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