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Age of tobacco use initiation and association with current use and nicotine dependence among US middle and high school students, 2014–2016

 

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Nov 2018494449
Dec 2018185015152
Jan 20195724421
Feb 20196273214
Mar 20196062719
Apr 2019183369
May 2019166297
Jun 2019138207
Jul 2019145216
Aug 2019183258
Sep 20192012714
Oct 20191762216
Nov 20192173720
Dec 20195863927
Jan 20208706440
Feb 20206533330
Mar 20202653221
Apr 20202123220
May 20202372719
Jun 2020124188
Jul 20201762012
Aug 2020148177
Total8829797386