Pathirana S L, Alles H K, Perera M K, Bandara S, Phone-Kyaw M, Mendis K N and Handunnetti S M.  ABO blood group types and protection against severe Plasmodium falciparum malaria.  Annals of Tropical Medicine and Parasitology 2005:99 (2);119-124(6).  DOI: http://dx.doi.org/10.1179/136485905X19946