Obstructive Sleep Apnea Is Highly Prevalent and Correlates With Impaired Glycemic Control in Consecutive Patients With the Metabolic Syndrome - Drager, Luciano F.; Queiroz, Eduardo L.; Lopes, Heleno F.; Genta, Pedro R.; Krieger, Eduardo M.; Lorenzi-Filho, Geraldo (Journal of the CardioMetabolic Syndrome, 2009)