Hooper Richard, Forbes Andrew, Hemming Karla, Takeda Andrea, Beresford Lee
Centre for Primary Care and Public Health, Queen Mary University of London, London E1 2AB, UK
Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia.
BMJ. 2018 Mar 20;360:k1121. doi: 10.1136/bmj.k1121.