Effects of psilocybin on sleep quality and brain microstructure in chronic cluster headache - Kristoffer Brendstrup-Brix; Brice Ozenne; Patrick M. Fisher; Dea S. Stenbæk; Anja S. Petersen; Sophia Armand; Drummond E-Wen. McCulloch; Maja Rou Marstrand-Joergensen; Sara M. Ulv Larsen; Annette Johansen; R O B V Jensen; Gitte M. Knudsen; et al. (Journal of Psychopharmacology, 2026)