Effects of active referral combined with a small financial incentive on smoking cessation: study protocol for a cluster randomised controlled trial.
Xue WengMan-Ping WangWilliam Ho Cheung LiDerek Yee Tak CheungChing Yin LauAntonio Cho Shing KwongVienna Wai Yin LaiSophia Siu Chee ChanTai Hing LamPublished in: BMJ open (2020)
ClinicalTrials.gov Registry NCT03565796.