00486nas a2200145   4500000000100000000000100001008004100002100001400043700001300057700001700070245022100087300001200308490000600320022001400326       2016                            d1 aI. Barker1 aT. Lloyd1 aA. Steventon00aEffect 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  ae0114220 v6  a2044-6055