IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-7-30881 Original Research Paper CLASSIFICATION OF COPD PATIENTS ACCORDING TO GOLD CRITERIA AND EFFECT OF BRONCHODILATOR BASED ON SPIROMETRY TRUPTI PATEL Dr. Dr. ZALAK GADANI Dr. Dr. SABIR AMDANI Dr. July 2020 9 7 01 02