CTRL and Parkinson disease: No correlation between the two variables was found for CTRL (coefficient correlation r = −0.037; p = 0.8812), ALS (r = −0.246; p = 0.1282) ADEM (r = 0.1643; p = 0.1643) and AD (r = 0.3251; p = 0.3251), and PD (r = −0.3128; p = 0.3490)