Fig. 4

In-house data analysis: A distribution of alpha-CGRP levels vs. age, green line represents a linear regression and red dotted line represents the CI; B distribution of beta-CGRP levels vs. age, green line represents a linear regression and red dotted line represents the CI; C distribution of beta-CGRP vs. alpha-CGRP levels, green line represents a linear regression and red dotted line represents the CI; D comparison of alpha-CGRP concentrations in subjects sorted by sex; E comparison of alpha-CGRP concentrations in subjects sorted by sex. Data is shown as average ± SD. Comparisons were made using Mann–Whitney U test, ns: non-significant; ** p < 0.01