ELOVL2 and hereditary endocrine growth disease: Six of the 11 CpG sites that showed significant differences in DNAm when comparing the healthy group with the growth disorder (sub-)groups are among those with a close correlation between DNAm and age (R > 0.75); the remaining 5 sites with a close correlation between DNAm and age (CpG1, CpG2, CpG5, CpG8 and CpG9 in ELOVL2) appear to be robust by exhibiting no significant differences between the two groups.