Colvin Christopher J, Fairall Lara, Lewin Simon, Georgeu Daniella, Zwarenstein Merrick, Bachmann Max O, Uebel Kerry E, Bateman Eric D
Centre for Infectious Disease Epidemiology and Research (CIDER), School of Public Health and Familyi Medicine, University of Cape Town, South Africa.
S Afr Med J. 2010 Mar 30;100(4):210-2. doi: 10.7196/samj.4124.