1. 1. Gültekin M, Ulukan Ç, Tezcan S, Doğu O, Hanağasi H, Bilgiç B, Bora Tokçaer A, Çakmur R, Elibol B, Mirza M, İnce Günal D, Erer Özbek ÇS, Kenangil G, Yilmaz Küsbeci Ö, Akbostanci MC. Multicenter study of levodopa carbidopa intestinal gel in Parkinson's disease: the Turkish experience. Turk J Med Sci 2020;50:66-85.
2. 2. Muangpaisan W, Mathews A, Hori H, Seidel D. A systematic review of the worldwide prevalence and incidence of Parkinson's disease. J Med Assoc Thai 2011;94:749-55.
3. The Incidence of Parkinson's Disease: A Systematic Review and Meta-Analysis;Hirsch;Neuroepidemiology,2016
4. 4. Kumaresan M, Khan S. Spectrum of Non-Motor Symptoms in Parkinson's Disease. Cureus 2021;13:e13275. doi:10.7759/cureus.13275
5. Barriers to reporting non-motor symptoms to health-care providers in people with Parkinson's;Hurt;Parkinsonism Relat Disord,2019