Goedhals Dominique, Rossouw Inéz, Hallbauer Ute, Mamabolo Mitta, de Oliveira Tulio
Department of Medical Microbiology and Virology, National Health Laboratory Service, University of the Free State, Bloemfontein, South Africa.
Lancet. 2012 Aug 18;380(9842):702. doi: 10.1016/S0140-6736(12)60957-X.