LTBP4 and familial dilated cardiomyopathy: When grouping by LTBP4 haplotype, no DCM onset events were observed in 6 IAAM/IAAM steroid-treated patients, while median onset of DCM in 67 steroid-treated patients carrying other haplotypes was 19.0 years; however this difference was not significant (log-rank p = 0.26) (Fig 2F).