1 Division of Critical Care Medicine, Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, USA. Electronic address: drlong@uw.edu.
2 Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, USA.
3 Department of Laboratory Medicine, University of Washington, Seattle, WA, USA.
4 Department of Microbiology, University of Washington, Seattle, WA, USA.