Authors: Trisha Greenhalgh; Ellen Annandale; Richard Ashcroft; James Barlow; Nick Black; Alan Bleakley; Ruth Boaden; Jeffrey Braithwaite; Nicky Britten; Franco Carnevale; Kath Checkland; Julianne Cheek; Alex Clark; Simon Cohn; Jack Coulehan; Benjamin Crabtree; Steven Cummins; Frank Davidoff; Huw Davies; Robert Dingwall; Mary Dixon-Woods; Glyn Elwyn; Eivind Engebretsen; Ewan Ferlie; Naomi Fulop; John Gabbay; Marie-Pierre Gagnon; Dariusz Galasinski; Ruth Garside; Lucy Gilson; Peter Griffiths; Penny Hawe; Jan-Kees Helderman; Brian Hodges; David Hunter; Margaret Kearney; Celia Kitzinger; Jenny Kitzinger; Ayelet Kuper; Saville Kushner; Andree Le May; France Legare; Lorelei Lingard; Louise Locock; Jill Maben; Mary Ellen Macdonald; Frances Mair; Russell Mannion; Martin Marshall; Carl May; Nicholas Mays; Lorna McKee; Marissa Miraldo; David Morgan; Janice Morse; Sarah Nettleton; Sandy Oliver; Warrren Pearce; Pierre Pluye; Catherine Pope; Glenn Robert; Celia Roberts; Stefania Rodella; Jo Rycroft-Malone; Margarete Sandelowski; Paul Shekelle; Fiona Stevenson; Sharon Straus; Deborah Swinglehurst; Sally Thorne; Göran Tomson; Gerd Westert; Sue Wilkinson; Brian Williams; Terry Young; Sue Ziebland Journal: BMJ Date: 2016-02-10