Relative Prolongation of Inspiratory Time Predicts High versus Low Resistance Categorization of Hypopneas Relative Prolongation of Inspiratory Time Predicts High versus Low Resistance Categorization of Hypopneas Download Waking Up to the Risks of Online Direct-to-Consumer Advertising of Sleep Apnea Screening Tests A Combination Appliance for Obstructive Sleep Apnea: The Effectiveness of Mandibular Advancement and Tongue Retention