Additional File 1.

Annex 1: Definition of facility types as coded in the unit cost database.

Annex 2: Percentage of missing data in the model variables prior to data imputation.

Annex 3: Countries and number of unit cost observations included in the model.

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Adam et al. Cost Effectiveness and Resource Allocation 2003 1:3   doi:10.1186/1478-7547-1-3