Syncope, Vasovagal

• Emory University — Atlanta, Georgia, United States
• University of North Carolina — Chapel Hill, North Carolina, United States

• Ohio University — Athens, Ohio, United States
• American Red Cross Blood Services - Central Ohio Region — Columbus, Ohio, United States

Not specified

• Pietro Palmisano — Tricase, Lecce, Italy
• Dell'Era Gabriele — Novara, Italy

• University of Kansas Medical Center — Kansas City, Kansas, United States

• Royan Institute — Tehran, Iran

• Daegu Catholic University Medical Center — Daegu, South Korea

• Henning Mølgaard, MD, DMSc — Århus N, Denmark

• Hamilton Health Science-Heart Investigation Unit — Hamilton, Ontario, Canada

• National Institute of Neurological Disorders and Stroke (NINDS) — Bethesda, Maryland, United States