Prevalence of trachoma at sub-district level in ethiopia: determining when to stop mass azithromycin distribution. oleh Jonathan D King, Tesfaye Teferi, Elizabeth A Cromwell, Mulat Zerihun, Jeremiah M Ngondi, Mesele Damte, Frew Ayalew, Zerihun Tadesse, Teshome Gebre, Ayelign Mulualem, Alemu Karie, Berhanu Melak, Mitku Adugna, Demelash Gessesse, Abebe Worku, Tekola Endashaw, Fisseha Admassu Ayele, Nicole E Stoller, Mary Rose A King, Aryc W Mosher, Tesfaye Gebregzabher, Geremew Haileysus, Peter Odermatt, Jürg Utzinger, Paul M Emerson