Nazif Fuadi Noer*, Ali N. Nasution, Nizam Akbar, Anggia C. Lubis, Hilfan A. P Lubis, Harris Hasan. COMPARISON OF FUNCTIONAL CAPACITY VALUES MEASURED BY SIX MINUTES WALK TEST (6MWT) IN CHRONIC OBSTRUCTIVE LUNG PATIENTS ACCOMPANIED. IJRSM 2020, 7, 25-31.