Authors: Gervais Ondobo Andze; Abel Namsenmo; Benoit Kebella Illunga; Ditu Kazambu; Dieula Delissaint; Christopher Kuaban; Francois-Xavier Mbopi-Kéou; Wilfred Gabsa; Leopold Mulumba; Jean Pierre Bangamingo; John Ngulefac; Melissa Dahlke; David Mukanga; Peter Nsubuga Journal: Pan Afr Med J Date: 2011-12-14