We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleComparing cannabis with tobacco.AuthorsHenry, John A; Oldfield, William L G; Kon, Onn MinPublicationBMJ (Clinical research ed.), 2003, Vol 326, Issue 7396, p942ISSN1756-1833Publication typeCommentaryDOI10.1136/bmj.326.7396.942