1 Division of General Internal Medicine, Department of Medicine/University of Washington/Seattle. Electronic address: perrinr@uw.edu.
2 Division of Medical Oncology, Department of Medicine/University of Washington/Seattle.
3 Clinical Research Division, Fred Hutchinson Cancer Research Center/Seattle, WA; Division of Dermatology, Department of Medicine/University of Washington/Seattle.
4 Department of Pathology, University of Washington/Seattle.
5 Division of General Internal Medicine, Department of Medicine/University of Washington/Seattle.