Bonell Chris, McKee Martin, Fletcher Adam, Haines Andrew, Wilkinson Paul
Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London WC1H 9SH, UK.
Lancet. 2011 Jun 25;377(9784):2158-9. doi: 10.1016/S0140-6736(11)60063-9. Epub 2011 Jan 16.