Ocular Involvement Occurs Frequently at All Stages of Amyotrophic Lateral Sclerosis: Preliminary Experience in a Large Italian Cohort. - Cozza F; Lizio A; Greco LC; Bona S; Donvito G; Carraro E; Tavazzi S; Ticozzi N; Poletti B; Sansone VA; Lunetta C (Journal of clinical neurology (Seoul, Korea), 2021)