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ECFMG, Philadelphia, USA
U.S. Department of Health and Human Services, Rockville, USA
National Headache Foundation, Chicago, USA
National Hospice and Palliative Care Organization, Alexandria, USA
American Academy of Hospice and Palliative Medicine, Chicago, USA
American Association of Neurological Surgeons, Rolling Meadows, Illinois, USA
American Academy of Orthopedic Surgery, Chapel Hill
European Committee for Hyperbaric Medicine, Lille, France
American Board of Pathology, Tampa, USA
American Board of Pediatrics, Chapel Hill, USA
American College of Hyperbaric Medicine, West Allis, USA
The American National Red Cross, Washington, DC, USA
WHO
Doctors for Global Health, Decatur, USA