Service delivery reform for maternal and newborn health in Kakamega County, Kenya: study protocol for a prospective impact evaluation and implementation science study.Croke K, Gage A, Fulcher I, Opondo K, Nzinga J, Tsofa B, Haneuse S, Kruk M
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Geographic access to care is not a determinant of child mortality in a rural Kenyan setting with high health facility density.Moisi JC, Gatakaa H, Noor AM, Williams TN, Bauni E, Tsofa B, Levine OS, Scott JA
BMC Public Health, (2010). 10:142