1. Institute for Behavioral Genetics University of Colorado Boulder CO USA
2. Department of Ecology and Evolutionary Biology University of Colorado Boulder CO USA
3. Department of Psychology University of Minnesota Minneapolis MN USA
4. GenOmics, Bioinformatics, and Translational Research Center, RTI International, Research Triangle Park NC USA
5. Department of Integrative Physiology University of Colorado Boulder CO USA
6. Department of Psychology and Neuroscience University of Colorado Boulder CO USA