1. Oregon Health and Science University, Department of Medicine, Division of Hematology and Medical Oncology, Portland, Oregon.
2. Oregon Health and Science University, School of Nursing, Portland, Oregon.
3. Oregon Health and Science University, Department of Medicine, Division of General Medicine and Geriatrics, Portland, Oregon.
4. Portland VA Medical Center, Portland, Oregon.
5. Oregon Health and Science University, Department of Medicine, Division of Pulmonary and Critical Care Medicine, Portland, Oregon.