1. Department of Psychology Brigham Young University Provo UT USA
2. Center for Scientific Review Division of AIDS, Behavior and Population Sciences NIH Bethesda MD USA
3. Department of Clinical and Health Psychology University of Florida Gainesville FL USA
4. College of Family, Home, and Social Sciences Brigham Young University Provo UT USA
5. Laboratory of Comparative Ethology National Institute of Child Health and Human DevelopmentNIH Animal Center Poolesville MD USA