1. Northwestern University Feinberg School of Medicine, Chicago, IL, USA
2. Emory University, Atlanta, GA, USA
3. University of California, San Francisco, San Francisco, CA, USA
4. Mills-Peninsula Medical Center, San Mateo, CA, USA
5. Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA
6. Johns Hopkins University School of Medicine, Baltimore, MD, USA
7. Arizona State University, Scottsdale, AZ, USA
8. Mayo Clinic Arizona, Scottsdale, AZ, USA