Am J Prev Med
http://www.ncbi.nlm.nih.gov/pubmed/21406279
40(4):448-53
https://connects.catalyst.harvard.edu/Profiles/profile/141873
Tracking the rise in popularity of electronic nicotine delivery systems (electronic cigarettes) using search query surveillance.
Am J Prev Med
http://www.ncbi.nlm.nih.gov/pubmed/21406279
40(4):448-53
https://connects.catalyst.harvard.edu/Profiles/profile/141873