de Savigny, D; Webster, J; Agyepong, IA; Mwita, A; Bart-Plange, C; Baffoe-Wilmot, A; Koenker, H; Kramer, K; Brown, N; Lengeler, C; (2012) Introducing vouchers for malaria prevention in Ghana and Tanzania: context and adoption of innovation in health systems. Health policy and planning, 27. pp. 32-43. ISSN 0268-1080 https://researchonline.lshtm.ac.uk/id/eprint/427516 Full text not available from this repository.