Implementation and validation of telepathology triage at cancer referral center in rural Rwanda von Mpunga, T, Hedt-Gauthier, BL, Tapela, N, Nshimiyimana, I, Muvugabigwi, G, Pritchett, N, Greenberg, L, Benewe, O, Shulman, DS, Pepoon, JR, Shulman, LN, Milner, DA