Applying a gender lens to understand pathways through care for acutely ill young children in Kenyan urban informal settlements by Muraya, K, Ogutu, M, Mwadhi, M, Mikusa, J, Okinyi, M, Magawi, C, Zakayo, S, Njeru, R, Haribondhu, S, Uddin, MF, Marsh, V, Walson, JL, Berkley, JA, Molyneux, S