Trachoma prevalence after discontinuation of mass azithromycin distribution by Godwin, W, Prada, JM, Emerson, P, Hooper, PJ, Bakhtiari, A, Deiner, M, Porco, TC, Mahmud, H, Landskroner, E, Hollingsworth, TD, Medley, GF, Pinsent, A, Bailey, R, Lietman, TM, Oldenburg, CE