Dietary sources of caffeine.
D000328:Adult; D000368:Aged; D001628:Beverages / Q000032:analysis; D002110:Caffeine / Q000032:analysis*; D005260:Female; D005504:Food Analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D004366:Nonprescription Drugs / Q000032:analysis
D004366:Nonprescription Drugs; D002110:Caffeine