PT - JOURNAL ARTICLE AU - Richard J Lilford TI - Implementation science at the crossroads AID - 10.1136/bmjqs-2017-007502 DP - 2017 Nov 28 TA - BMJ Quality & Safety PG - bmjqs-2017-007502 4099 - http://qualitysafety.bmj.com/content/early/2017/11/28/bmjqs-2017-007502.short 4100 - http://qualitysafety.bmj.com/content/early/2017/11/28/bmjqs-2017-007502.full