Secretory immunoglobulin levels in cancer patients.
D000368:Aged; D006257:Head; D006258:Head and Neck Neoplasms / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A; D008875:Middle Aged; D009369:Neoplasms / Q000276:immunology*; D012463:Saliva / Q000276:immunology
D007070:Immunoglobulin A