Fig. 1

Frequency distribution of a age [years] and b the sum of the Charlson Comorbidity Index (CCI) for male (orange) and female (blue) clinical cases (n = 825) included in this study
Frequency distribution of a age [years] and b the sum of the Charlson Comorbidity Index (CCI) for male (orange) and female (blue) clinical cases (n = 825) included in this study