Mumtaz Zubia, Salway Sarah, Bhatti Afshan, McIntyre Lynn
School of Public Health, University of Alberta, Edmonton, AB, Canada.
National Institute for Health Research School for Public Health Research, School of Health and Related Research, University of Sheffield, Sheffield, UK.
Lancet. 2014 Mar 22;383(9922):1095-7. doi: 10.1016/S0140-6736(13)61646-3. Epub 2013 Oct 2.