Performance of peripheral arterial tonometry–based testing for the diagnosis of obstructive sleep apnea in a large sleep clinic cohort Performance of peripheral arterial tonometry–based testing for the diagnosis of obstructive sleep apnea in a large sleep clinic cohort Download Patients with obstructive sleep apnea present with chronic upregulation of serum HIF-1α protein Restless legs syndrome associated with use of stevia nonnutritive sweetener