RT Journal Article SR Electronic T1 Quitting smoking: Still a challenge, but newer tools show promise JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 39 OP 48 DO 10.3949/ccjm.81a.14016 VO 82 IS 1 A1 Collins, Gregory B. A1 Jerry, Jason M. A1 Bales, Robert YR 2015 UL http://www.ccjm.org/content/82/1/39.abstract AB