
A randomized controlled trial on the benefits and respiratory adverse effects of morphine for refractory dyspnea in patients with COPD: Protocol of the MORDYC study
Keywords: 6MWT; six minute walking test; CAT; COPD Assessment Test; COPD; Chronic Obstructive Pulmonary Disease; EQ-5D-5L; 5-Level version of EuroQol-5 Dimensions; FEV1; forced expiratory volume in the first second; FVC; forced vital capacity; GOLD; Global initiati