“…Of these 35 studies, 22 (62.9%) were published in the last 5 years of the study period (January 2012–November 2016), and 13 (37.1%) were published in the first 5 years (January 2007–December 2011). Of the 35 studies reviewed (Table 1), 14 (40%) were retrospective19–23,34–38,41,43,44, 7 (20%) were prospective14,25,27,29,30,33,39, 9 (25.7%)1,5,9,16,18,31,32,40,42, 2 (5.7%) were survey15,28, 2 (5.7%) were letters to an editor17,24 and one (2.9%) was a case report26. The SSA countries emphasized in the studies were Nigeria (14), South Africa (9), Kenya (8), Ghana (6), Malawi (5), Uganda (4), Zambia (4), Cameroon (3), Liberia (3), Sierra Leone (3), Mozambique (3) and Zimbabwe (3).…”