Hemoglobin Is a Vital Determinant of Arterial Oxygen Content in Hypoxemic Patients with Pulmonary Arteriovenous Malformations. - Rizvi, A; Macedo, P; Babawale, L; Tighe, HC; Hughes, JM; Jackson, JE; Shovlin, CL (Annals of the American Thoracic Society, 2017)