1. Oregon Health & Science University, Portland, USA
2. North Carolina Agricultural and Technical State University, Greensboro, USA
3. Portland Veterans Affairs Medical Center, OR, USA
4. California Pacific Medical Center Research Institute, San Francisco, USA
5. University of California, San Francisco, USA
6. University of Minnesota, Minneapolis, USA
7. Stanford University School of Medicine, CA, USA
8. Columbia University Medical Center, New York, NY, USA