_:vb50941755 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7578144/"^^ . _:vb50941755 . _:vb50941755 . _:vb50941755 "A movement disorder that is characterized by disturbances of balance, gait and posture."^^ . _:vb50941755 . _:vb50941755 .