Rats, fats, and history.
D000818:Animals; D001671:Biochemistry / Q000266:history*; D005223:Fats / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D052756:Nutritional Sciences / Q000266:history*; D051381:Rats; D014495:Universities / Q000266:history; D014801:Vitamin A / Q000266:history; D014922:Wisconsin
D005223:Fats; D014801:Vitamin A