A lovely statistic! Thanks. As to whether it is important: you give one question (do we need to study Burkina or can we base policy in burkina on resarch in S Africa?) A second question is equally important. Is tehre any evidence in teh countries where there is no research that evidence has any influence on a) policy and b) more importantly, practice (ie 'de facto policy as opposed to a theroetical policy not designed for implementation)?