A physician survey of the effect of drug sample availability on physicians' behavior. - Chew, Lisa D.; O'Young, Theresa S.; Hazlet, Thomas K.; Bradley, Katharine A.; Maynard, Charles; Lessler, Daniel S.; Chew, L D; O'Young, T S; Hazlet, T K; Bradley, K A; Maynard, C; Lessler, D S (JGIM: Journal of General Internal Medicine, 2000)