The natural experiment.
D000820:Animal Diseases; D000818:Animals; D000829:Animals, Domestic / Q000502:physiology*; D001717:Birds; D001794:Blood Pressure; D004195:Disease Models, Animal; D006736:Horses; D008322:Mammals / Q000502:physiology*; D008954:Models, Biological; D051381:Rats; D013686:Telemetry; D014422:Turkeys