[1] Univ Hosp Bern, Sleep Wake Epilepsy Ctr, Bern, Switzerland
[2] Univ Hosp Bern, Dept Neurol, Bern, Switzerland
[3] Univ Bern, Bern, Switzerland
[4] Univ Bern, Clin Trials Unit, Bern, Switzerland
[5] Helios Klin Hagen Ambrock, Dept Neurol, Narcolepsy Ctr, Hagen, Germany