[1] Texas A&M Univ, Coll Vet Med & Biomed Sci, Dept Vet Physiol & Pharmacol, College Stn, TX 77843 USA
[2] Texas A&M Univ, Coll Vet Med & Biomed Sci, Michael E DeBakey Inst, College Stn, TX 77843 USA
[3] Univ Delaware, Dept Psychol, Newark, DE 19716 USA
[4] Indiana Univ Purdue Univ, Dept Psychol, Indianapolis, IN 46202 USA