LTBP4 and Duchenne muscular dystrophy: In humans, a haplotype of four missense single-nucleotide polymorphisms (SNPs) encoding LTBP4 was reported as an attractive candidate modifier of human DMD, tested in the UDP susceptibility rs2303729 (V194I), rs1131620 (T787A), rs1051303 (T820A), and rs10880 (T1140M).