1. Department of Preventive Medicine; Northwestern University Feinberg School of Medicine; Chicago IL USA
2. School of Psychology; University of Exeter; Exeter UK
3. Departments of Preventive Medicine and Psychology; University of Southern California Keck School of Medicine; Los Angeles CA USA
4. University of Wisconsin-Madison School of Medicine and Public Health; Madison WI USA
5. William S. Middleton Memorial Veterans Hospital; Madison WI USA