Letter: The Maudsley reactive and nonreactive strains of rats: the need for an objective evaluation of differences.
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D001835:Body Weight; D004644:Emotions / Q000502:physiology*; D005824:Genetics, Behavioral; D051381:Rats; D011919:Rats, Inbred Strains / Q000502:physiology*; D012737:Sex Factors