1Armauer Hansen Research Institute, Ethiopia.
2Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Ethiopia.
3Animal Health and Veterinary Laboratories Agency, Weybridge UK.
4GlaxoSmithKline, Copenhagen Denmark.
5Swiss Tropical and Public Health Institute, Basel (Switzerland) and University of Basel, Basel Switzerland.
6MRC National Institute for Medical Research and Imperial College London UK
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