Third, although our study was strengthened by examining both VHA and Medicare data, we were not able to identify hyperglycemia and hypoglycemia events for which patients did not seek emergency care; thus, these events are likely underestimated.43 Fourth, because of limitations of pharmacy data, we were unable to examine the impact of changes in insulin dosing and thus did not examine patients taking insulin before hospitalization. The gene discussed is INS; the disease is Hypoglycemia.