We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleUnplanned quit attempts--results from a U.S. sample of smokers and ex-smokers.AuthorsFerguson SG; Shiffman S; Gitchell JG; Sembower MA; West RPublicationNicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 2009, Vol 11, Issue 7, p827ISSN1469-994xPublication typearticleDOI10.1093/ntr/ntp072