Other than the redefinition of the chr5:50–51 Mb locus described above [35], we did not detect any signal at the previously claimed Dobermann DCM loci at chr14:20.9 Mb (PDK4, known as “DCM1” gene test) [39] and chr36:22.3 Mb (TTN, known as “DCM2” gene test) [38] or regions corresponding to human DCM loci at canine chr20:29.8 Mb (human BAG3, rs2234962) [87], chr2:81.6 Mb (human HSPB7, rs10927886) [88], chr20:4.3 Mb (human chr3p25.1, rs62232870) [6], and chr26:28.6–28.8 (human chr22q11.23) (Additional file 1: Fig. S3). This evidence concerns the gene PDK4 and familial dilated cardiomyopathy.