Global Cluster Headaches Market Size, Trends & Growth Opportunity, By Drug Type (Triptans, Octreotide, Opioids, and Others), By Drug Application (Abortive, Transitional, and Preventive), and By Product Type (Calcium Channel Blockers, Corticosteroids, Lithium Carbonate, Ergots, Melatonin, Anti-Seizure, and Local Anaesthetics), Regional Outlook, Competitive Market Share & Forecast, 2022 – 2027.