RT Journal Article SR Electronic T1 USA: price cuts and point of sale ads follow tax rise JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 242 OP 242 DO 10.1136/tc.8.3.242 VO 8 IS 3 A1 FRANK CHALOUPKA A1 SANDY SLATER A1 MELANIE WAKEFIELD YR 1999 UL http://tobaccocontrol.bmj.com/content/8/3/242.1.abstract AB