Impact of a district-wide health center strengthening intervention on healthcare utilization in rural Rwanda: An interrupted time series analysis - H. Iyer; L. Hirschhorn; E. Kamanzi; P. Drobac; F. Cyamatare; E. Nahimana; M. Law; F. Nkikabahizi; A. Muhire; P. Basinga (Ubiquity Press, 2015)