THE UNDERUSE OF SPIROMETERY IN ROUTINE MEDICAL PRACTICE FOR DIAGNOSIS AND MANAGEMENT OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) PATIENTS IN KARACHI, PAKISTAN. IJCBR [Internet]. 2015 Jul. 23 [cited 2026 Oct. 14];1(3):20-9. Available from: https://sumathipublications.com/index.php/ijcbr/article/view/71