title: Softening up on the hardening hypothesis.
authors.affiliation: Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. jocohen@jhsph.edu
authors.forename: Joanna E
authors.initials: JE
authors.lastname: Cohen
authors.forename: Paul W
authors.initials: PW
authors.lastname: McDonald
authors.forename: Peter
authors.initials: P
authors.lastname: Selby
mesh_terms: D001294:Attitude to Health; D006801:Humans; D012907:Smoking / Q000453:epidemiology / Q000523:psychology; D016540:Smoking Cessation / Q000379:methods* / Q000523:psychology; D000074606:Smoking Prevention; D014029:Tobacco Use Disorder / Q000453:epidemiology / Q000628:therapy; D017211:Treatment Failure