By Okoko B. J.   Wesumperuma H. L.   Fern J.   Yamuah L. K.   Hart C. A.   in Annals of Tropical Paediatrics

ISSN:1465-3281|22|4|325-332

Maney Publishing‎(2002)‎

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By Wesumperuma H. L.   Perera A. J.   Pharoah P. O. D.   Hart C. A.   in Annals of Tropical Medicine and Parasitology

ISSN:1364-8594|93|2|169-177

Routledge Ltd‎(1999)‎

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