Muntaser E. Ibrahim - NLH Laboratory, P.O. Box 287, Khartoum, Sudan
Fatih M. Awad-El-Kariem - Department of Medical Parasitology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
Ibrahim M. El Hassan - Malaria Administration, Khartoum, Sudan
El Rashid M. El Mubarak - Malaria Administration, Khartoum, Sudan