Speak To Analyst Global Rare Neurodegenerative Disease Treatment Market Size, Share & Trends Analysis Report by Indications (Parkinson’s Disease, Amyotrophic Lateral Sclerosis, Alzheimer’s Disease, Multiple Sclerosis, Spinal Muscular Atrophy, Huntington Disease, and Other Indications), by Drug Class (Immunomodulator Drugs, Cholinesterase Inhibitors, Dopamine Agonists, N-methyl-D-Aspartate Receptor Antagonists, and Others) Forecast 2022-2028