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Cohort study of electronic cigarette use: effectiveness and safety at 24 months

 

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Jun 201623181896431
Jul 2016653580113
Aug 201652557681
Sep 201628345376
Oct 201650470761
Nov 201659985485
Dec 201637977754
Jan 201733743252
Feb 201712835177
Mar 20171133961
Apr 2017223718183
May 2017163156119
Jun 20171771323103
Jul 2017540591122
Aug 201739138779
Sep 201733732566
Oct 201743041973
Nov 201744543349
Dec 201732330723
Jan 201832631952
Feb 201832930746
Mar 201843842766
Apr 201898098047
May 201869970174
Jun 201859159634
Jul 201857257234
Aug 201875475327
Sep 201840343556
Oct 201843646037
Nov 201847650141
Dec 201835838344
Jan 201936538755
Feb 201935435747
Mar 201943341943
Apr 201931633346
May 201928425838
Jun 201927625632
Jul 201930626628
Aug 201919214833
Sep 201924219642
Oct 201931023359
Nov 201927920152
Dec 201930324366
Jan 202031724753
Feb 202028419560
Mar 202029420859
Apr 202030122732
May 202016311631
Total19799283483242