1. The Boyd Orr Centre for Population & Ecosystem Health, School of Biodiversity, One Health & Veterinary Medicine, College of Medical, Veterinary & Life Sciences, University of Glasgow , Glasgow , UK
2. School of Social and Political Sciences/Institute of Health and Wellbeing, University of Glasgow , 27 Bute Gardens-Rm 221, Glasgow , G12 8RS, UK
3. Kilimanjaro Christian Medical Centre, Kilimanjaro Clinical Research Institute, Moshi , Tanzania
4. Department of Paediatrics, Kilimanjaro Christian Medical University College , Moshi , Tanzania