RT Journal Article SR Electronic T1 Interventions for smoking cessation: the outcomes are determined by the questions asked JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 231 OP 232 DO 10.1034/j.1399-3003.1999.13b01.x VO 13 IS 2 A1 RP Murray A1 NR Anthonisen YR 1999 UL http://erj.ersjournals.com/content/13/2/231.abstract AB