Lottery incentives for smoking cessation at the workplace: a cluster randomized trial BMC Public Health Springer Nature Link Effect of unguided e cigarette provision on uptake, use, and smoking cessation among adults who smoke in the USA: a naturalistic, randomised, controlled clinical trial ScienceDirect Frontiers The efficacy and acceptability of pharmacological monotherapies and e cigarette on smoking cessation: a systemic review and network meta analysis Interdiction des e cigarettes usage unique en Nouvelle Zlande Addict Aide Le village des addictions Programs that pay smokers to quit cost effective from health care sector perspective