Buried in this month's issue of the journal Diabetes is a study that, properly understood, suggests that most of what doctors "know" about Type 2 diabetes is wrong.The study is titled β-Cell Dysfunction in Subjects With Impaired Glucose Tolerance and Early Type 2 Diabetes: Comparison of Surrogate Markers With First-Phase Insulin Secretion From an Intravenous Glucose Tolerance Test.To understand