1. World Health Organization Global Taskforce on Cholera Control. Cholera outbreak: assessing the outbreak response and improving preparedness. Geneva: World Health Organization; 2004 [cited 2014 Dec 14]. http://whqlibdoc.who.int/hq/2004/WHO_CDS_CPE_ZFk_2004.4_eng.pdf?ua=1
2. World Health Organization. Cholera factsheet no. 107. Geneva: World Health Organization; 2014 Feb [cited 2014 Dec 14]. http://www.who.int/mediacentre/factsheets/fs107/en/
3. World Health Organization. Cholera, 2013. Wkly Epidemiolog Rec. 2014;89:345–56 [cited 2014 Dec 14]. http://www.who.int/wer/2014/wer8931/en/
4. World Health Organization. Cholera in southern Sudan—update. Geneva: World Health Organization; 2006 March 6 [cited 2014 Dec 14]. http://www.who.int/csr/don/2006_03_06/en/
5. World Health Organization. Cholera in southern Sudan—update 2. Geneva: World Health Organization; 2006 March 22 [cited 2014 Dec 14]. http://www.who.int/csr/don/2006_03_22/en/