Subject
Humans; Biopsy; Morbidity; Pulmonary Disease; Apoptosis; Cachexia/etiology/pathology/physiopathology; Cell Nucleus/pathology; Chronic Obstructive/complications; Exercise Tolerance; Inflammation; Mitochondria; Muscle Fibers/pathology; Muscle/pathology; Muscular Atrophy/etiology/pathology/physiopathology; Sarcomeres/pathology