Cross-country analysis of contextual factors and implementation strategies in under-5 mortality reduction in six low- and middle-income countries 2000-2015.

"Declarations Ethics approval and consent to participateThis overall project was reviewed by the Rwanda National Ethics Committee and Northwestern University and determined to be non-human-subjects research. Each of the country case studies were reviewed and approved by in-country Ethics Review Committees (Bangladesh, PR-18074; Ethiopia, PM23/281; Nepal, 165–2018; Peru, 104276; Rwanda, 132/RNEC/2017; Senegal, SEN18/33). Interviewees were informed about the goals and structure of the project, and verbal informed consent for participation was obtained from all interview participants. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was supported by The Bill & Melinda Gates Foundation grant [OPP1191491]. Funding was provided by Gates Ventures. These funding bodies were not directly involved in the development of this manuscript."