A systematic search of PubMed and Cochrane databases, as well as World Bank websites, for programmes with a nutrition component that were intended to reach large populations was commissioned for the Series (see webextra material associated with Bhutta and colleagues' contribution to this Series). Inclusion criteria were based on the quality of the evaluation design, and a full report is available at www.lancet.com. 28 programmes in 18 countries were identified and reviewed.
Survey of