GOLD2017 - The refined ABCD assessment tool. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; GOLD: Global Initiative for Chronic Obstructive Lung Disease; mMRC: modified Medical Research Council; CAT: COPD Assessment Test. #Diagnosis #Pulmonary #COPD #GOLD2017 #Staging #Grading #Classification #FEV1FVC #mMRC