Ethnic group and serum pepsinogen.
D000328:Adult; D001741:Black or African American; D004792:Enzyme Precursors / Q000097:blood*; D005006:Ethnicity; D006801:Humans; D007585:Jews; D008297:Male; D008875:Middle Aged; D010434:Pepsin A / Q000097:blood*; D014481:United States
D004792:Enzyme Precursors; D010434:Pepsin A