Incremental cost and cost-effectiveness of the addition of indoor residual spraying with pirimiphos-methyl in sub-Saharan Africa versus standard malaria control: results of data collection and analysis in the Next Generation Indoor Residual Sprays (NgenIRS) project, an economic-evaluation. - Yukich J; Digre P; Scates S; Boydens L; Obi E; Moran N; Belemvire A; Chamorro M; Johns B; Malm KL; Kolyada L; Williams I; et al. (Malaria journal, 2022)