Heikens Geert Tom, Bunn James, Amadi Beatrice, Manary Mark, Chhagan Meera, Berkley James A, Rollins Nigel, Kelly Paul, Adamczick Charlotte, Maitland Kathryn, Tomkins Andrew
Department of Paediatrics, College of Medicine, University of Malawi, Blantyre, Malawi.
Lancet. 2008 Apr 12;371(9620):1305-7. doi: 10.1016/S0140-6736(08)60565-6.