Figure 1From: Evidence-based new service package vs. routine service package for smoking cessation to prevent high risk patients from cardiovascular diseases (CVD): study protocol for randomized controlled trial Flow chart for enrollment and follow-up plan for RCT with an additional non-randomized arm. Note: *Fagerstrom nicotine dependence test, NRT nicotine replacement therapy. Bold arrows show the randomized trial, and the dotted arrow shows the non-randomized arm.Back to article page