A ‘telephone first’ approach to demand management in English general practice: a multimethod evaluation oleh Jennifer Newbould, Sarah Ball, Gary Abel, Matthew Barclay, Tray Brown, Jennie Corbett, Brett Doble, Marc Elliott, Josephine Exley, Anna Knack, Adam Martin, Emma Pitchforth, Catherine Saunders, Edward CF Wilson, Eleanor Winpenny, Miaoqing Yang, Martin Roland