How to do (or not to do) ... Tracking data on development assistance for health.

Development assistance for health (DAH) has increased substantially in recent years and is seen as important to the improvement of health and health systems in developing countries. As a result, there has been increasing interest in tracking and understanding these resource flows from the global health community. A number of datasets, each with its own strengths and weaknesses, are available to track DAH. In this article we review the available datasets on DAH and summarize the strengths and weaknesses of each of these datasets to help researchers make the best choice of which to use to inform their analysis. Finally, we also provide recommendations about how each of these datasets could be improved.