TY - STAND AU - I. Barker AU - T. Lloyd AU - A. Steventon BT - BMJ Open DO - 10.1136/bmjopen-2016-011422 M1 - 9 PY - 2016 EP - e011422 T2 - BMJ Open TI - Effect of a national requirement to introduce named accountable general practitioners for patients aged 75 or older in England: regression discontinuity analysis of general practice utilisation and continuity of care VL - 6 SN - 2044-6055 ER -