Knutson KL, Van Cauter E, Zee P, Liu K, Lauderdale DS. Cross-Sectional Associations Between Measures of Sleep and Markers of Glucose Metabolism Among Subjects With and Without Diabetes: The Coronary Artery Risk Development in Young Adults (CARDIA) Sleep Study. Diabetes Care. 2011 May; 34(5): 1171–1176. PMCID: PMC3114508