Dang, N. H.; Nguyen, T. H. T.; Do, T. T. T. COMPARISON OF CLINICAL AND SUBCLINICAL OF OUTPATIENT MANAGEMENT OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE AT THE RESPIRATORY CLINIC OF CAN THO UNIVERSITY OF MEDICINE AND PHARMACY HOSPITAL IN 2 PHASES 7 2019-7 2020 AND 7 2020-7 2021. CTJUMP 2023, 49-56.