Medical testing for neurodegenerative disorders and other diagnostic or treatment purposes; Providing collected and analyzed medical information for diagnostic and treatment purposes for neurodegenerative disorders; Performing quantitative neuropathological assessments of sensory, motor, and/or autonomic nerve fiber density; Providing a pathological test for a diagnosis of synucleinopathy; Diagnostic services, namely, medical diagnostic testing for neurodegenerative disorders; Medical diagnostic testing, monitoring and reporting services; Providing medical data and information to healthcare professionals; Providing medical information to medical professionals in the form of reports in the field of neurological disorders; Diagnostic preparations for skin biopsies for clinical or medical laboratory use; Diagnostic kits consisting of buffers and reagents for use in testing of neurodegenerative disorders