Mitochondrial dysfunctions have been reported in Parkin (PARK2), PINK1 (PARK6)-, DJ-1 (PARK7)-, LRRK2 (PARK8)-, and CHCHD2 (PARK22)-linked familial cases (Park et al., 2018), and several risk variants of these genes have been identified in idiopathic cases of PD (Kalia and Lang, 2015, Nalls et al., 2014). The gene discussed is PINK1; the disease is Parkinson disease.