Authors: Christopher C Butler; Kathryn O'Brien; Timothy Pickles; Kerenza Hood; Mandy Wootton; Robin Howe; Cherry-Ann Waldron; Emma Thomas-Jones; William Hollingworth; Paul Little; Judith Van Der Voort; Jan Dudley; Kate Rumsby; Harriet Downing; Kim Harman; Alastair D Hay Journal: Br J Gen Pract Date: 2015-04 Impact factor: 5.386