TY - JOUR T1 - Ask the expert: Smoking cessation JF - Breathe JO - Breathe SP - 57 LP - 62 DO - 10.1183/18106838.0601.057 VL - 6 IS - 1 AU - J. Prignot Y1 - 2009/09/01 UR - http://breathe.ersjournals.com/content/6/1/57.abstract ER -