Authors: Lara Fairall, Max Bachmann, Carl Lombard, Venessa Timmerman, Kerry Uebel, Merrick Zwarenstein, Andrew Boulle, Daniella Georgeu, Christopher J. Colvin, Simon Lewin, Gill Faris, Ruth Cornick, Beverly Draper, Mvula Tshabalala, Eduan Kotzé, Cloete van Vuuren, Dewald Steyn, Ronald Chapman, Eric D. Bateman - The Lancet 2012 cited by 305