1. All authors are in the Department of Medicine, Hospital of the University of Pennsylvania. Jessica R. Golbus, MD, is a Resident Physician; David A. Manly, MD, is a Resident Physician; Katherine A. Wonneberger, MD, is a Resident Physician; Thomas C. Hanff, MD, is a Resident Physician; Kathleen M. Murphy, MD, is a Resident Physician; Daniel S. Wang, MD, is a Resident Physician; Steven G. McKee, MD,