Sex was adjusted in all SNP association analyses (sex-interactions explored and reported separately). All remaining twins were removed from the analyses, leaving 4,682 for genetic analyses. Number was reduced further due to missing data in the phenotypes, e.g. for final height N = 4,677 and for growth data maximum N = 3,538 (Figure 2) which was further reduced depending on the minimum number of measurement points required for analysis at certain age windows, as explained in Text S1.
