GGTLC1 and metabolic syndrome: Due to the retrospective nature of this study and the limited data available to assess patients’ rates of metabolic syndrome-associated comorbidities such as lipoprotein (HDL, LDL), total serum cholesterol, triglyceride, glycated haemoglobin, gamma-glutamyl transpeptidase, aspartate transaminase, alanine transaminase, fibrinogen, C-reactive protein and erythrocyte sedimentation rate were not included in the analysis.