Begum, SIshaq, MHabibullah, C MMateen, M A2009-05-282009-05-281996-02-01Begum S, Ishaq M, Habibullah CM, Mateen MA. Antibodies to serum IgA detected by ELISA in duodenal ulcer and their relationship to chronicity of the disease. Indian Journal of Experimental Biology. 1996 Feb; 34(2): 180-1http://imsear.searo.who.int/handle/123456789/60234engAutoantibodies --bloodCase-Control StudiesChronic DiseaseDuodenal Ulcer --immunologyEnzyme-Linked Immunosorbent AssayHumansImmunoglobulin A --bloodAntibodies to serum IgA detected by ELISA in duodenal ulcer and their relationship to chronicity of the disease.Comparative Study