Kidd, MichaelManning, GarthHowe, AmandaQidwai, WarisBeasley, John Wvan Weel, Chris2015-12-080140-6736http://hdl.handle.net/1885/31704Copyright Information: © 2014 Elsevier Ltd.Primary care research201410.1016/S0140-6736(14)62031-62016-02-24