Case-Control Studies human 58 Humans 56 controlled study 52 article 50 priority journal 50 adult 44 female 42 Female 40 Male 36 male 34 Adult 32 Middle Aged 32 clinical article 22 major clinical study 22 case control study 20 Aged 18 aged 14 Argentina 10 middle aged 10 neuropsychological test 10 Analysis of Variance 8 Article 8 Genetic Predisposition to Disease 8 Mutation 8 Parkinson Disease 8 Parkinson disease 8 Young Adult 8 functional magnetic resonance imaging 8 genotype 8