Low-dose psilocybin in short-lasting unilateral neuralgiform headache attacks: results from an open-label phase Ib ascending dose study - James Rucker; Matthew Butler; Sadie Hambleton; Catherine Bird; Mathieu Seynaeve; Sanjay Cheema; Kete Campbell-Coker; Carolina Maggio; Fiona Dunbar; Giorgio Lambru; Manjit Matharu (Headache The Journal of Head and Face Pain, 2024)