Authors: John L Campbell; Emily Fletcher; Nicky Britten; Colin Green; Tim A Holt; Valerie Lattimer; David A Richards; Suzanne H Richards; Chris Salisbury; Raff Calitri; Vicky Bowyer; Katherine Chaplin; Rebecca Kandiyali; Jamie Murdoch; Julia Roscoe; Anna Varley; Fiona C Warren; Rod S Taylor Journal: Lancet Date: 2014-08-03 Impact factor: 79.321