Migraine without Aura

• Hartford Headache Center — Hartford, Connecticut, United States
• Clinvest Research — Springfield, Missouri, United States
• Mercy Hospital — St Louis, Missouri, United States
• Clinical Reseach Consortium — Las Vegas, Nevada, United States

• Annette C. Toledano MD — North Miami, Florida, United States

• Eeuwfeestkliniek — Antwerp, Belgium
• A.Z. Sint Jan — Bruges, Belgium
• Cliniques Universitaires St Luc — Brussels, Belgium
• C.H.U. de Charleroi — Charleroi, Belgium

• Dongzhimen Hospital — Beijing, China

• Rabia Rukiye Akinci — Erzurum, Turkey (Türkiye)

• Özge Çoban — Ankara, Turkey (Türkiye)

• Danish Headache Center — Glostrup Municipality, Denmark

• DanishHC — Glostrup Municipality, Denmark

• Chengdu University of TCM — Chengdu, Sichuan, China

Not specified