N. Ukwandu and O. Nmorsi, “SERA FROM NIGERIAN CHILDREN WITH GENITOURINARY SCHISTOSOMIASIS HAVING IMMUNE COMPLEXES AND HEAT LABILE LEUCOCYTE MIGRATION INHIBI- TORY FACTORS WITHOUT IMPAIRED CELLULAR IMMUNITY”, Pakistan Journal of Scientific & Industrial Research, vol. 47, no. 5, pp. 380–386, Oct. 2004.