Orthostatic Intolerance

• Hospital Universitario San Juan de Alicante — Sant Joan d'Alacant, Alicante, Spain
• Hospital Universitari General de Castellón — Castellon, Castellón, Spain
• Hospital Universitario Álvaro Cunqueiro de Vigo — Vigo, Pontevedra, Spain
• Hospital del Mar — Barcelona, Spain

• Mayo Clinic in Rochester — Rochester, Minnesota, United States

• Pusan National University Yangsan Hospital — Yangsan, Gyeongsangnam-do, South Korea

• Kessler Foundation — West Orange, New Jersey, United States

• Clarkson University, Lewis School of Health & Life Sciences — Potsdam, New York, United States

• Virnigia Commonwealth University — Richmond, Virginia, United States

Not specified

Not specified

Not specified

• University Medical Centre Ljubljana — Ljubljana, Slovenia