_:b57647888 . _:b57647888 _:b57647889 . _:b57647886 _:b57647887 . _:b57647889 "IgA antibody" . _:b57647886 . _:b57647889 . _:b57647886 . _:b57647886 . _:b57647886 _:b57647888 . _:b57647887 "T026" . _:b57647886 "1"^^ . _:b57647887 "C2754978" .