Beta blockers Market - Global Industry Size, Share, Trends, Opportunity, and Forecast, Segmented By Type (Non-selective Agents, Selective Agents), By Indication (Angina Pectoris, Heart Failure, High Blood Pressure, Others), By Drugs (Betaxolol, Acebutolol, Esmolol, Others), By Distribution Channel (Hospital Pharmacy; Retail Pharmacy; Online Pharmacy), By Application (Cardiac Diseases, Hypertension