1. Department of Psychology, University of California, Los Angeles, California, USA;
2. Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, California, USA
3. Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, California, USA
4. Department of Psychological Science, University of California, Irvine, California, USA