Comparing different intensities of active referral to smoking cessation services in promoting smoking cessation among community smokers: a study protocol of a cluster randomized controlled trial.
Xue WengMan-Ping WangYi Nam SuenWilliam Ho Cheung LiYongda WuDerek Yee Tak CheungAntonio Cho Shing KwongVienna Wai Yin LaiSophia Siu Chee ChanTai Hing LamPublished in: BMC public health (2018)
ClinicalTrials.gov Identifier: NCT02804880 , June 17, 2016.