Authors: Colin C Everett; Keith Aa Fox; Catherine Reynolds; Catherine Fernandez; Linda Sharples; Deborah D Stocken; Kathryn Carruthers; Harry Hemingway; Andrew T Yan; Shaun G Goodman; David Brieger; Derek P Chew; Chris P Gale Journal: BMJ Open Date: 2019-09-05 Impact factor: 2.692