A three-stage genome-wide association study recently identified single nucleotide polymorphisms (SNPs) in five loci (fibroblast growth receptor 2 (FGFR2). trinucleotide repeat containing 9 (TNRC9). mitogen-activated protein kinase 3 K1 (MAP3K1). 8q24. https://fitnessgravesyardes.shop/product-category/upper-brake-assembly/