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Zhao, J. (author)Obstructive Sleep Apnea Syndrome (OSAS) is characterized by periods of cessation and reduction of the nasal airflow during sleep. 2 - 4% of the western population suffers from the OSAS which enormously impacts the sleep quality and is associated with significant morbidity of other diseases. Due to its physical cause, a steady 56% of OSAS...master thesis 2012