Steele Sarah, Martyn Jeanine, Foell Jens
Global Health, Policy and Innovation Unit, Barts and the London School of Medicine and Dentistry, Queen Mary, University of London, UK
Lifespan, 167 Point Street, Rhode Island, USA.
BMJ. 2015 Mar 24;350:h1485. doi: 10.1136/bmj.h1485.