1. de Lau L.M., Breteler M.M.: Epidemiology of Parkinson's disease. Lancet Neurol. 5, 525–535 (2006)
2. Gupta, B.M., Bala, A.: Parkinson's disease in India: an analysis of publications output during 2002–2011. Int. J. Nutr. Pharmacol. Neurol. Dis. 3, 254–262 (2013)
3. GBD 2015 Neurological Disorders Collaborator Group.: Global, regional, and national burden of neurological disorders during 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015. Lancet Neurol. 16, 877–897 (2017)
4. GBD 2016 Parkinson’s Disease Collaborators.: Global, regional, and national burden of Parkinson’s disease, 1990–2016: a systematic analysis for the Global Burden of Disease Study 2016. Lancet Neurol. 17, 939–953 (2018)
5. Darweesh, S.K.L., Raphael, K.G., Brundin, P., Matthews, H., Wyse, K., Chen, H., Bloem, B.R.: Parkinson Matters. J. Parkinsons Dis. 8, 495–498 (2018)