1. Sightsavers, 35 Perrymount Road, Haywards Heath , Sussex, RH16 3BW , UK
2. Director, Programme for Neglected Tropical Diseases , Monrovia , Liberia
3. Locational Analysis Ltd, Poole, Dorset BH16 6FA , UK
4. Director, Neglected Tropical Diseases, Sightsavers , P.O. Box KIA 18190, Airport, Accra , Ghana
5. Liberia Country Office, Sightsavers , Monrovia , Liberia
6. Department of Tropical Disease Biology, Liverpool School of Tropical Medicine , Pembroke Place, Liverpool L3 5QA , UK