1. Yale University, School of Medicine, Department of Epidemiology and Public Health
2. Yale University, School of Nursing, Center for Excellence in Chronic Illness Care, New Haven
3. The Connecticut Hospice and John D. Thompson Institute for Training, Education, and Research, Inc., Branford
4. Yale University, School of Medicine, Department of Epidemiology and Public Health, New Haven, Connecticut, U.S.A.