Brodersen John, Kramer Barnett S, Macdonald Helen, Schwartz Lisa M, Woloshin Steven
Centre of Research and Education in General Practice, Primary Healthcare Research Unit, Department of Public Health, University of Copenhagen
Division of Cancer Prevention, National Cancer Institute, Bethesda, MD, USA.
BMJ. 2018 Aug 17;362:k3494. doi: 10.1136/bmj.k3494.