Evidence for non-communicable diseases: analysis of Cochrane reviews and randomised trials by World Bank classification (BMJ Open, 2013)

(untitled) - Heneghan, C; Blacklock, C; Perera, R; Davis, R; Banerjee, A; Gill, P; Liew, S; Chamas, L; Hernandez, J; Mahtani, K; Hayward, G; Harrison, S; et al.