Household mapping, and individual enumeration and screening
All households within the study area were mapped to create a sampling frame for estimating coverage of interventions and subsequent evaluations. Household locations were mapped using hand-held eTrex global positioning system (GPS) receivers (Garmin Ltd., Olathe, KS) and readings were taken from the door of the household, if possible, or from a point that was most representative of the household. Additionally, all household residents living in the mapped households were enumerated, screened if living in the intervention arms, and informed consent for study participation was sought as described above.