1. Seattle Science Foundation, Seattle, Washington,
2. Department of Medicine, University of Illinois College of Medicine, Chicago, Illinois,
3. Department of Medicine, Western University of Health Sciences College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, Oregon,
4. Swedish Medical Center, Swedish Neuroscience Institute, Washington,
5. Department of Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany.
6. Hansjörg Wyss Hip and Pelvic Center, Swedish Hospital, Seattle, Washington,
7. Riverside University Health System Medical Center, Moreno Valley, California, United States,