Derivation and internal validation of a data-driven prediction model to guide frontline health workers in triaging children under-five in Nairobi, Keny by Mawji, A, Akech, S, Mwaniki, P, Dunsmuir, D, Bone, J, Wiens, M, Görges, M, Kimutai, D, Kissoon, N, English, M, Ansermino, M