%0 Journal Article %T Tobacco-Free Pharmacy Laws and Trends in Tobacco Retailer Density in California and Massachusetts %A Amy K. Ferketich %A Bo Lu %A Elizabeth G. Klein %A Micah Berman %A Randi E. Foraker %A Yue Jin %J Archive of "American Journal of Public Health". %D 2016 %R 10.2105/AJPH.2015.303040 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4986051/