The Lancet, 374. www.thelancet.com/journals/lancet/article/PIIS0140-6736(09)61266-6/full… doi:10.1016/S0140-6736(08)61345-8
Article published in online 'Mail & Guardian' South Africa 6th November 2006. http://www.mg.co.za/articlePage.aspx?articleid=28961...