Assertion: tonsil | /r/CapableOf | represent functional analog of galt
Facets:
value: for the upper aerodigestive tract
type: PURPOSE
Source sentences:
text: The early observation by Ogra (1971) that combined tonsillectomy and adenoidectomy reduced preexisting IgA antibody levels in nasopharyngeal fluid, together with findings that have demonstrated preferential engraftment of human tonsillar B cells into the lungs of mice with severe combined immunodeficiency (Nadal et al., 1991), has led to the notion that the tonsils may represent a functional analog of GALT for the upper aerodigestive tract (Brandtzaeg, 1987, 1996, 1999).