title: Secretor status as a genetic marker in duodenal ulcer--a comparative study.
authors: PMRC Research Centre, Jinnah Postgraduate Medical Centre, Karachi.
authors: S M
authors: SM
authors: Rizvi
authors: S J
authors: SJ
authors: Zuberi
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D000328:Adult; D004381:Duodenal Ulcer / Q000235:genetics*; D005787:Gene Frequency / Q000235:genetics*; D005819:Genetic Markers / Q000235:genetics*; D006801:Humans; D010154:Pakistan; D012307:Risk Factors; D012463:Saliva / Q000737:chemistry*
chemical_list: D000017:ABO Blood-Group System; D005819:Genetic Markers