Basta Nicole E, Christensen Hannah
University of Minnesota, School of Public Health, Minneapolis, MN 55454, USA.
University of Bristol, School of Social and Community Medicine, Bristol, England, UK.
Lancet. 2016 Dec 3;388(10061):2719-2721. doi: 10.1016/S0140-6736(16)32061-X. Epub 2016 Oct 27.