title: Determination of immunoglobulin A concentrations in human nasal secretions with a serum immunoglobulin A standard.
abstract: By quantitative immunodiffusion tests, nasal secretion immunoglobulin A was underestimated by approximately 5.6-fold when the serum 7S immunoglobulin A standard was employed.
mesh_terms: D005779:Immunodiffusion; D007070:Immunoglobulin A / Q000032:analysis* / Q000592:standards; D009093:Mucus / Q000276:immunology*; D009297:Nasal Mucosa / Q000378:metabolism*
chemical_list: D007070:Immunoglobulin A