1. Abd Elhafeez AA (2004) Psychosocial impact of sickle cell anemia on affected children and their families. Clinical M.D. (Paediatrics and Child Health) thesis, University of Khartoum, Khartoum
2. Abdalla MA, Katugampola M, Za K (1986) Cystic fibrosis in Saudi Arabia: a case report. Saudi Med J 7:189–191
3. Abuzeid SO (2004) Hepatitis B surface antigen among children with sickle cell disease in some Khartoum hospitals. Clinical M.D. (Paediatrics and Child Health) thesis, University of Khartoum, Khartoum
4. Abu-Zeid YA, Abdulhadi NH, Hviid L, Theander TG, Saeed BO, Jepsen S, Jensen JB, Bayoumi RA (1991) Lymphoproliferative responses to Plasmodium falciparum antigens in children with and without sickle cell trait. Scand J Immunol 34:237–242
5. Abu-Zeid YA, Abdulhadi NH, Theander TG, Hviid L, Saeed BO, Japsen S, Jensen JB, Bayoumi RA (1992a) Seasonal changes in cell-mediated immune responses to soluble Plasmodium falciparum in children with haemoglobin AA and haemoglobin AS. Trans R Soc Trop Med Hyg 86:20–22