Worldwide availability of medications for migraine and tension-type headache: A survey of the International Headache Society

Francesca Puledda^*, Irene de Boer, Roberta Messina, David Garcia-Azorin, Marcio Nattan Portes Souza, Mohammad Al-Mahdi Al-Karagholi, Olivia Begasse de Dhaem, Cristina Tassorelli, Arne May

^*Corresponding author af dette arbejde