1. Department of Psychology, University of Denver, Denver, Colorado
2. Obstetrics and Gynecology, University of California, Irvine, Orange, California
3. University of Colorado, Anschutz Medical Campus, Aurora, Colorado
4. Department of Psychology, Chapman University, Orange, California
5. Department of Psychiatry, University of California, Irvine, Irvine, California
6. Mothers and Babies Research Centre, Hunter Medical Research Institute, Faculty of Health, University of Newcastle, Callaghan, New South Wales, Australia