Type 1 diabetic Tamara Khachatoorian, 26, injects herself with insulin at the J.W.C.H. safety-net clinic in the center of skid row in downtown Los Angeles in this July 30, 2007 file photo. The number of adults with diabetes worldwide has more than doubled since 1980 to 347 million, a far larger number than previously thought and one that suggests costs of treating the disease will also balloon.