Haptoglobin and Iron in Parkinson's Disease

Inclusion Criteria for the Controls, for the blood draw and epidemiology visit: * Volunteers should be of age between 52 and 82 years of age, males of females. Exclusion Criteria for the Controls: * presence of a neurodegenerative disease, * presence of active cancer under treatment, * HIV sero-positivity, Hepatitis B, C, of A sero-positivity * rheumatoid arthritis * recent blood donation (less than three months before the visit). * fever at the time of the visit Inclusion Criteria for the Parkinson's disease patients: Diagnosis of Parkinson's disease (UKBB clinical criteria). Exclusion criteria for the Parkinson's disease patients, for the blood draw and epidemiology visit: * Presence of other neurodegenerative diseases, apart for Parkinson's disease * two or more family members with Parkinson's disease * presence of active cancer under treatment * HIV sero-positivity, Hepatitis B, C, of A sero-positivity * rheumatoid arthritis * recent blood donation (less than three months before the visit). * fever at the time of the visit Exclusion criteria for the Magnetic Resonance Imaging: * presence in the body of a ferro-magnetic metallic foreign object such as, but not limited to: * a cardiac pacemaker * aneurism clip * neuro-stimulator * surgical clip * artificial limb or joint * orthopedic items, such as screws, nails, pins, rods, * any metallic foreign body from a previous injury, bullets, shrapnels, metal slivers. * exclusion criteria for MRI is also the presence of claustrophobia