Evelyn Korkor Ansah, Solomon Narh-Bana, Sabina Asiamah, Vivian Dzordzordzi, Kingsley Biantey, Kakra Dickson, John Owusu Gyapong, Kwadwo Ansah Koram, Brian M Greenwood, Anne Mills, Christopher J. M Whitty
PLoS Med. 2009 January; 6(1): e1000007. Published online 2009 January 6. doi: 10.1371/journal.pmed.1000007