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Lancet. 2011 July 16; Volume 378 (Issue 9787); 282-4.; DOI:10.1016/S0140-6736(10)62303-3
Schouten EJ, Jahn A, Midiani D, Makombe SD, Mnthambala A, et al.
Lancet. 2011 July 16; Volume 378 (Issue 9787); 282-4.; DOI:10.1016/S0140-6736(10)62303-3