G6PC2 and diabetes mellitus: For example, abstracts placed into the Autoimmunity category (Level 1) and assigned to the Diabetes category (Level 2) received an assignment to the Glutamic Acid Decarboxylase (GAD), Heat Shock Proteins (HSP), Insulinoma-Associated Protein-2 (IA2), Islet-Specific Glucose-6-Phosphatase Catalytic Subunit-Related Protein (IGRP), Insulin/Proinsulin (INSULIN), Other (OTH), or Various/Multiple (VAR) Level 3 category.