Levothyroxine Improves Subjective Sleepiness in a Euthyroid Patient with Narcolepsy without Cataplexy Levothyroxine Improves Subjective Sleepiness in a Euthyroid Patient with Narcolepsy without Cataplexy Download Hopelessness Mediates the Relation between Insomnia and Suicidal Ideation Obstructive Sleep Apnea Is Associated with Impaired Exercise Capacity: A Cross-Sectional Study