MT-ATP6 and Parkinsonism: Suspecting atypical Parkinsonism, a Wilson disease study and genetic tests of Charcot–Marie–Tooth (CMT), atypical Parkinsonisms (PARKs, GAB, DNAJC6, VPS13C, PINK, and LG), and atypical spinal–muscular atrophies (DYNC1H1, BICD, VAPB, GARS, DYNC1H1, mtATP6, and mtATP8) were carried out.