Fig. 7From: Dosimetrically administered nebulized morphine for breathlessness in very severe chronic obstructive pulmonary disease: a randomized, controlled trialChanges in peak expiratory flow values, expressed as L/min; comparison of best and worst values obtained during morphine and 0,9% NaCl periods. MCID, Minimal Clinically Important Difference [25]; PEF, Peak Expiratory FlowBack to article page