ZPR1 and hypochondroplasia: On GMDR analyses, an inter-locus interaction among the ZNF259 rs2075290, BUD13 rs17119975 and BUD13 rs11556024 SNPs was found to be associated with the risk of HCH and that among the ZNF259 rs2075290, BUD13 rs17119975 and BUD13 rs10790162 SNPs were associated with the risk of HTG, respectively.