Dangoni Filho, Iron, Hálisson Flamini Arantes, Ulisses Cardoso D´Orto, Luis Sergio Fernandes Marques, Bruno Schuind Arantes, and Mario Fernando Prieto Peres. “Feasibility of Intravenous Ketamine Infusion for Refractory Headache”. Headache Medicine 10, no. 3 (September 30, 2019): 70–72. Accessed December 22, 2024. https://headachemedicine.com.br/index.php/hm/article/view/28.