University of Zurich / Zurich / Switzerland and 2Internal Medicine / Center for Integrative Human Physiology / Hartmann-Mu¨ller Stiftung / University Hospital of Zurich / Department of Internal Medicine / Pulmonary Division / University of Wisconsin Sleep / Public Health Service / European Sleep Research Society / Swiss National Science Foundation / J. Sleep Res / University Hospital Zurich / Ethics Committee / Sleep Disorders Atlas Task Force of the American Sleep Disorders Association EEG Arousals / /