Affiliation: | (1) National Centre of Tropical Medicine, Instituto de Salud Carlos III, , C/Sinesio Delgado 6, 28029 Madrid, Spain;(2) National Centre of Endemic Control, Instituto de Salud Carlos III, , Bata, Equatorial Guinea, Africa;(3) National Sleeping Sickness Control Programme, Ministry of Health and Social Welfare, , Bata, Equatorial Guinea, Africa |