Lankester, F., Kibona, T. J., Allan, K. J., de Glanville, W., Buza, J. J., Katzer, F., Halliday, J. E., Mmbaga, B. T., Wheelhouse, N., Innes, E. A., Thomas, K., Nyasebwa, O. M., Swai, E., Claxton, J. R., & Cleaveland, S. The value of livestock abortion surveillance in Tanzania: identifying disease priorities and informing interventions