Acceptability and feasibility of tests for infection, serological testing, and photography to define need for interventions against trachoma by Renneker, KK, Mtuy, TB, Kabona, G, Mbwambo, SG, Mosha, P, Mollel, JM, Hooper, P, Emerson, PM, Hollingsworth, TD, Butcher, R, Solomon, AW, Harding-Esch, EM