1. Section of Infectious Diseases, Providence Regional Medical Center Everett, Everett, Washington
2. Providence Research Network, Renton, Washington
3. Medical Intensive Care Unit, Providence Regional Medical Center Everett, Everett, Washington
4. Department of Infection Prevention and Control, Providence Regional Medical Center Everett, Everett, Washington
5. Office of Clinical Research, Providence Health and Services, Southern California Region, Los Angeles