[Link to published trial protocol][1]: Kastaun S, Leve V, Hildebrandt J, et al. Effectiveness of training general practitioners to improve the implementation of brief stop-smoking advice in German primary care: study protocol of a pragmatic, 2-arm cluster randomised controlled trial (the ABCII trial). BMC family practice. 2019;20(1):107.
[Link to German Clinical Trials Register:][2] DRKS00012786.
[1]: https://bmcfampract.biomedcentral.com/articles/10.1186/s12875-019-0986-8
[2]: https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00012786