Obstructive sleep apnea in patients with idiopathic pulmonary fibrosis: pulmonary hypertension could be the missing link for the diagnosis and different positive airway pressure treatment outcomes Obstructive sleep apnea in patients with idiopathic pulmonary fibrosis: pulmonary hypertension could be the missing link for the diagnosis and different positive airway pressure treatment outcomes Download It’s possible: why don’t we do it? Oximetry data affect the quality of gold standard polysomnography