title: Portals of entry--a review.
mesh_terms: D000707:Anaphylaxis / Q000276:immunology; D000818:Animals; D001692:Biological Transport; D001780:Blood Coagulation Tests; D003602:Cytotoxicity, Immunologic; D005512:Food Hypersensitivity / Q000209:etiology*; D006801:Humans; D007114:Immunization; D007328:Insulin / Q000627:therapeutic use; D007422:Intestines / Q000276:immunology; D007428:Intradermal Tests; D011233:Precipitin Tests; D012260:Ribonucleases / Q000378:metabolism; D014361:Trypsin Inhibitors / Q000494:pharmacology
chemical_list: D007328:Insulin; D014361:Trypsin Inhibitors; D012260:Ribonucleases