Global, regional, and national comparative risk assessment of 79 behavioural, environmental and occupational, and metabolic risks or clusters of risks in 188 countries, 1990–2013: a systematic analysis for the Global Burden of Disease Study 2013Mohammad H. Forouzanfar, Mohammed K. Ali, Semaw Ferede Abera et al.|The Lancet|2015Cited by 2.7k