Associations between the intake of caffeinated and decaffeinated coffee and measures of insulin sensitivity and beta cell function.
Loopstra-Masters RC, Liese AD, Haffner SM, Wagenknecht LE, Hanley AJ. Associations between the intake of caffeinated and decaffeinated coffee and measures of insulin sensitivity and beta cell function. Diabetologia. 2011 Feb; 54(2):320-8.