Wang, Wenjuan, Rebecca Winter, Lindsay Mallick, Lia Florey, Clara Burgert-Brucker, and Emily Carter. 2015. The relationship between the health service environment and service utilization: linking population data to health facilities data in Haiti and Malawi. DHS Analytical Studies No. 51. Rockville, Maryland, USA: ICF International. Available at http://dhsprogram.com/pubs/pdf/AS51/AS51.pdf.