Summary of studies that met the inclusion criteria.

I A fully pooled analysis is a study that relies on resource use and effectiveness data from all participating countries II A fully split analysis is one that relies on resource use and effectiveness from one or a subset of countries. III Partially split analysis relies on effectiveness data from all participating countries but relies on resource use data from one or a subset of countries. IV One-country costing applies the unit cost from one country V Multi-country costing applies unit costs from two or more participating countries. Summary of studies that met the inclusion criteria.