1. VA Connecticut Healthcare System West Haven Connecticut USA
2. Research Center Parker University Dallas Texas USA
3. Yale School of Medicine Yale University New Haven Connecticut USA
4. VA Palo Alto Health Care System Palo Alto California USA
5. Palmer College of Chiropractic West Campus San Jose California USA
6. Department of Neurosurgery Medical College of Wisconsin Milwaukee Wisconsin USA
7. Baylor Scott & White Health Round Rock Texas USA
8. American Heart Association Dallas Texas USA
9. American College of Cardiology Washington District of Columbia USA
10. Department of Environmental Medicine Unit of Intervention and Implementation Research for Worker Health, Karolinska Intitutet Stockholm Sweden