5. ASSESSMENT OF SLEEP QUALITY USING THE PSQI SCORE IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE TREATED AS OUTPATIENTS AT BACH MAI HOSPITAL IN 2025. YHCĐ. 2025;66(CĐ10-HNKH Trường ĐH Phenikaa). doi:10.52163/yhc.v66iCD10.2608