1. Swiss Tropical and Public Health, Kreuzstrasse 2, 4123 Allschwil, Switzerland;
2. University of Basel, Petersplatz 1, 4003 Basel, Switzerland;
3. Jigjiga University, P.O. Box 1020, Jigjiga, Ethiopia;
4. Somali Regional State, Adadle Health and Livestock Resource and Pastoral Development Offices, Gode, Ethiopia;
5. Armauer Hansen Research Institute, Addis Ababa, Ethiopia