1. From the Department of Surgery, Division of General Surgery (Chan, Fischkoff), Columbia University Medical Center, New York, NY.
2. Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine (Prager), Columbia University Medical Center, New York, NY.
3. Department of Medicine, Center for Clinical Medical Ethics (Prager, Dugdale, Fischkoff), Columbia University Medical Center, New York, NY.
4. Department of Medicine, Division of General Medicine (Dugdale), Columbia University Medical Center, New York, NY.