Authors: Paresh Jobanputra; Fiona Maggs; Alison Deeming; David Carruthers; Elizabeth Rankin; Alison C Jordan; Abdul Faizal; Carolyn Goddard; Mark Pugh; Simon J Bowman; Sue Brailsford; Peter Nightingale Journal: BMJ Open Date: 2012-11-12 Impact factor: 2.692