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| Methods | Parallel randomized controlled trial with blind evaluation |
| Participants | 942 adults who smoke |
| Interventions | Intervention: brief advice plus exhaled carbon monoxide measure Control: brief face‐to‐face anti‐smoking advice from the physician during patient consultation |
| Outcomes | Sustained abstinence (at 6 and 12 months) validated by urine cotinine test |
| Notes | ISRCTN67499921 |
