Developmental course(s) of lifetime cigarette use and panic attack comorbidity: an equifinal phenomenon?
Bernstein A, Zvolensky MJ, Schmidt NB, Sachs-Ericcson N. Developmental course(s) of lifetime cigarette use and panic attack comorbidity: an equifinal phenomenon? Behav Modif. 2007 Jan; 31(1):117-35.