Plasma vitamin A and carotene levels in relation to the clinical stages of carcinoma of the oral cavity and oropharynx.
D002338:Carotenoids / Q000097:blood*; D006801:Humans; D009062:Mouth Neoplasms / Q000097:blood*; D010610:Pharyngeal Neoplasms / Q000097:blood*; D014801:Vitamin A / Q000097:blood*
D014801:Vitamin A; D002338:Carotenoids