Diagnostics of olfactory dysfunction in Parkinson's disease - a literature overview and case series. - Vasina L; Pastorkova N; Vorobiov O; Janouskova K; Dytrych P; Hlozek J; Musilova S; Astl J; Holy R (Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia, 2026)