Regional association plots for chromosome 4p16.3 loci FGFRL1 rs4647940, IDUA rs6827815 and IDUA rs3755955 for FN-BMD trait (based on hg19/1000 Genomes Mar 2012 EUR). (A) The region encompassing rs4647940 with ±100-kb flanking regions, and (B) a zoom-in view of the center region, [i.e. the dashed rectangle in (A)], encompassing rs4647940 with ±27-kb regions. BMD, bone mineral density; EUR, European; FN, femoral neck.