IgA concentration.
D004386:Duodenum; D005873:Giardiasis / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis*; D007419:Intestinal Secretions / Q000276:immunology; D007421:Intestine, Small / Q000276:immunology; D008722:Methods; D010189:Pancreatic Juice / Q000276:immunology
D007070:Immunoglobulin A