iSPHYNCS: An Update on the Internationalization and New Approaches of the Swiss Primary HYpersomnolence and Narcolepsy Cohort Study. - Schmidt, M.H.; van der Meer, J.; Wenz, E.; Fregolente, L.G.; Zub, K.; Warncke, J.D.; Gnarra, O.; Morand, R.; Helmy, A.; Zhang, Z.; Khatami, R.; von Manitius, S.; et al. (Sleep Medicine, 2026)