%0 Journal Article %A Thomas Round %A Gary Abel %T Seeing the wood and the trees: the impact of the healthcare system on variation in primary care referrals %D 2020 %R 10.1136/bmjqs-2019-010356 %J BMJ Quality & Safety %P 274-276 %V 29 %N 4 %U https://qualitysafety.bmj.com/content/qhc/29/4/274.full.pdf