Blinded rechecking of sputum smear microscopy performance in public health facilities in Tigray region, Northern Ethiopia: Retrospective cross sectional study von Weldemhret, Letebrhan, Hailu, Ataklti, Gebremedhn, Goyitom, Bekuretsion, Hadish, Alemseged, Gebreselassie, Gebreegziabher, Gebremicheal, Tesfahuney, Gebrhiwot, Berhe, Tesfaye, Legesse, Lemlem, Kalayu, Kelali, Tesfay, Mesfin, Mehari, Kibrti

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