COL6A3 and familial dilated cardiomyopathy: Notably, COL6A3 gene is a potential biomarker of DCM in the human induced pluripotent stem cell-derived cardiomyocyte model, as described by Zhuang and colleagues [29], as well as DCM cases reported in carriers of FKTN mutation, the gene linked to Fukuyama-type congenital MD [30].