Evolution and Predictive Factors of Improvement of Obstructive Sleep Apnea in an Obese Population After Bariatric Surgery Evolution and Predictive Factors of Improvement of Obstructive Sleep Apnea in an Obese Population After Bariatric Surgery Download Effect of Varying Definitions of Hypopnea on the Calculation of the Apnea-Hypopnea Index May Depend Upon the Level of Sympathetic Activation: Results From a Patient With Posttraumatic Stress Disorder Obstructive Sleep Apnea and Systemic Hypertension: Gut Dysbiosis as the Mediator?