1. Department of Health and Human Physiology, University of Iowa College of Liberal Arts and Sciences, University of Iowa, Iowa City, IA.
2. College of Nursing, University of Iowa, Iowa City, IA.
3. Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA.
4. Department of Psychology, College of Liberal Arts and Sciences, University of Iowa, Iowa City, IA.
5. Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, IA.
6. Department of Urology, Carver College of Medicine, University of Iowa, Iowa City, IA.
7. Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA.
8. Department of Psychiatry, VA Medical Center, Iowa City, IA.
9. Department of Psychiatry, Carver College of Medicine, University of Iowa, Iowa City, IA.
10. Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, IA.
11. Department of Internal Medicine, Veterans Administration Medical Center, Iowa City, IA.
12. Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA.