Atypical course of Parkinson’s disease with clinical manifestations of Huntington’s disease in a patient with an allele of 27 CAG repeats in the HTT gene - M. A. Nikitina; E. Yu. Bragina; M. S. Nazarenko; N. G. Zhukova; D. E. Gomboeva; K. F. Nurzhanova; N. V. Tsentr; V. M. Alifirova (Бюллетень сибирской медицины, 2021)