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Nasir, Usama, Muhammad Ali Tariq, Asad Ali, Syed Daniyal Asad, Ahmer Asif, FNU Farukhuddin, Rovaid Khan, Haris H. Chaudhry, and Sarah Choudry. "Slurring of Speech and Lip Paresthesia: Symptoms of Levodopa End of Dose Wearing Off in Parkinson's Disease." Cureus 2018.

Nasir, Usama, et al. "Slurring of Speech and Lip Paresthesia: Symptoms of Levodopa End of Dose Wearing Off in Parkinson's Disease." Cureus 2018.