Additional 29 SNPs that associated with height in two other publications [5],[6] or their proxies were obtained from a genome-wide scan for the NFBC1966 (original, detailed description in [30]) using Illumina's HumanCNV370-Duo DNA Analysis BeadChip. All these SNPs were directly genotyped (no imputed genotypes were used). Individuals who refused data delivery to collaborating units or had a gender mismatch between genotype and phenotype data were excluded from all analyses. Of those who had relatedness coefficient >0.20 (twins, half-siblings), the one with less complete genotype data was excluded at this stage. The number of exclusions in total was 173, leaving N = 4,763. Further exclusions explained in the Statistical Analyses reduced the final N to 4,682 with genome wide data. Figure 2 shows the identification of SNPs for our analyses, i.e. two “arms”, the one for genotyping done separately for NFBC1966 and the other for identification of SNPs from the NFBC1966 GWA data.
