Upper Airway Anatomical Balance Contributes to Optimal Continuous Positive Airway Pressure for Japanese Patients with Obstructive Sleep Apnea Syndrome Upper Airway Anatomical Balance Contributes to Optimal Continuous Positive Airway Pressure for Japanese Patients with Obstructive Sleep Apnea Syndrome Download Status Cataplecticus as Initial Presentation of Late Onset Narcolepsy A Case of Congenital Central Hypoventilation Syndrome with a Novel Mutation of the PHOX2B Gene Presenting as Central Sleep Apnea