1. National Institute of Environmental Health Sciences (2017) Neurodegenerative Diseases. National Institute of Environmental Health Services [Online]. https://www.niehs.nih.gov/research/supported/health/neu rodegenerative/index.cfm. Accessed 05 Dec 2017
2. The EU Joint Programme—Neurodegenerative Disease Research (JPND). What is neurodegenerative disease?. https://www.neurodegenerationresearch.eu/. Accessed 1 June 2020
3. Office of Communications and Public Liaison (2018) Amyotrophic Lateral Sclerosis (ALS) Fact Sheet | National Institute of Neurological Disorders and Stroke. National Institute of Neurological Disorders and Stroke [Online]. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Amyotrophic-Lateral-Sclerosis-ALS-Fact-Sheet. Accessed 02 Jan 2018
4. E. NAQVI, “Parkinson’s Disease Statistics,” Parkinson’s News Today. https://parkinsonsnewstoday.com/parkinsons-disease-statistics/. Accessed 1 June 2020
5. Shahbakhi M, Far DT, Tahami E (2014) Speech analysis for diagnosis of Parkinson’s disease using genetic algorithm and support vector machine. J Biomed Sci Eng 7(4):147–156