1. Northwestern University Feinberg School of Medicine, Chicago, Illinois
2. Michigan Orthopaedic & Spine Surgeons, Rochester Hills
3. St Joseph Heritage Healthcare, Fullerton, California
4. Chicago Clinical Research Institute, Chicago, Illinois
5. Pfizer Inc, Morrisville, North Carolina
6. Eli Lilly and Company, Indianapolis, Indiana
7. Pfizer Inc, Groton, Connecticut