In the period selected for the study, it wasnot recommended to perform the GV in patients with type 2 diabetes mellitus (T2DM) withmore than five years of history or using insulin; dyslipidemia; total cholesterolgreater than 250 mg%; LDL over 150 mg% or triglycerides above 250 mg%; andgastroesophageal reflux disease (GERD) in upper grades of Los Angeles classification orhiatal hernia with size greater than 2 cm. This evidence concerns the gene INS and type 2 diabetes mellitus.