1. Center for Compassion and Altruism Research and Education; School of Medicine, Stanford University; Stanford California USA
2. Department of Psychology; University of Wisconsin-Madison; Madison Wisconsin USA
3. Department of Psychiatry; University of Wisconsin-Madison; Madison Wisconsin USA
4. Department of Internal Medicine, Biostatistics and Geriatric Psychiatry Neuroimaging Lab; University of Pittsburgh; Pittsburgh Pennsylvania USA
5. Waisman Laboratory for Brain Imaging and Behavior; University of Wisconsin-Madison; Madison Wisconsin USA
6. Department of Psychology; University of Arizona; Tucson Arizona USA