Frank C. Mng'ong'o, Joseph J. Sambali, Eustachkius Sabas, Justine Rubanga, Jaka Magoma, Alex J. Ntamatungiro, Elizabeth L. Turner, Daniel Nyogea, Jeroen H. J. Ensink, Sarah J. Moore
PLoS One. 2011; 6(10): e25927. Published online 2011 October 12. doi: 10.1371/journal.pone.0025927