Migraine without Aura

• The Affiliated Hospital of Southwest Medical University — Luzhou, Sichuan, China
• The First Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China
• The Second Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China
• Zhejiang Provincial People's Hospital — Hangzhou, Zhejiang, China

• Tampa General Hospital Emergency Room — Tampa, Florida, United States

• Brigham and Womens Hospital — Boston, Massachusetts, United States
• Brigham and Women's Health Care Center — Chestnut Hill, Massachusetts, United States
• Brigham and Women's Hospital — Chestnut Hill, Massachusetts, United States

Not specified

• Universidad from Sevilla — Seville, Andalusia, Spain

Not specified

• CHU de Nîmes — Nîmes, France

• SISC — Florence, Italy

• Fondazione IRCCS Istituto Neurologico C. Besta, Neuroalgology Unit — Milan, Milano, Italy

• SOD Centro Cefalee e Farmacologia Clinica, AOU Careggi — Florence, Italy
• IRCCS National Neurological Institute "C. Mondino" Foundation — Pavia, Italy