No significant difference was disclosed with respect to ethnicity, average BMI, the prevalence of diabetes mellitus, dyslipidemia, average Charlson comorbidity score, the prevalence of the recently reported dipeptidyl peptidase 4 inhibitors (DPP4i)-associated BP and PD-1/PDL-1-associated BP, and the frequency of exposure to the main anti-hypertensive drug classes (Table 5). This evidence concerns the gene DPP4 and metabolic syndrome.