PKP2 and Arrhythmogenic right ventricular dysplasia: All patients had an ARVC-causative genetic variant(s), including 56 patients with plakophilin-2 (PKP2), 7 with desmoglein-2 (DSG2), 6 with desmocollin-2 (DSC2), 6 with desmoplakin (DSP), and 2 with plakoglobin (JUP).