Spiteri, Matthew, Russel Tilney, Edith Said, and Malcolm Vella. “Adult-Onset Levodopa-Unresponsive Parkinsonism As the Presenting Feature of Aromatic L-Amino Acid Decarboxylase Deficiency”. European Journal of Case Reports in Internal Medicine 13, no. 10 (September 4, 2026). Accessed November 3, 2026. https://ejcrim.com/index.php/ejcrim/article/view/7317.