1. a Department of Psychiatry , University of California , San Diego , CA , USA
2. b VA San Diego Healthcare System , San Diego , CA , USA
3. c Department of Psychiatry , University of Pennsylvania , Philadelphia , PA , USA
4. d Philadelphia VA Medical Center , Philadelphia , PA , USA
5. e Department of Psychology , Harvard University , Cambridge , MA , USA
6. f Institute for Social Research, University of Michigan , Ann Arbor , MI , USA
7. g Department of Psychiatry , Uniformed Services University of the Health Sciences , Bethesda , MD , USA