Gert Jan Lammers is professor of Neurology. The titel of his chair is: Sleep disorders, in particular narcolepsy and related vigilance disturbances. He is the medical director of the third line Sleep-Wake Centres of SEIN (Heemstede, Zwolle and Groningen), and also affiliated with the department of Neurology of the LUMC. The Sleep Wake Centre of SEIN has been designated by the NFU as a center of expertise for narcolepsy and related disorders. The current appointment is the first in the Netherlands dedicated to Sleep Medicine. Gert Jan Lammers is the current chair of the Dutch Society for Sleep Medicine (Slaapgeneeskunde Vereniging Nederland, SVNL). He is co-founder of the European Narcolepsy Network (EU-NN) and served as president from 2007-2014.