基金the Zambian Ministry of Health and the staff of CDL for their supportsupported by the FIND and the TARGETS Consortium(funded by the UK Department for International Development+3 种基金 DFID)Further support was received through a subcontract from Johns Hopkins University with funds provided by grant no.19790.01 from the Bill and Melinda Gates FoundationIts contents are solely the responsibility of the authors and do not necessarily the official views of FINDDFID or the Bill and Melinda Gates Foundation.