関連ワード:  lung function tests for copd    lung capacity test for copd    pulmonary function test for copd results    lung function test for emphysema    lung function test for copd chronic obstructive pulmonary disease    lung function test copd spirometry    lung function test copd vs asthma    pulmonary function tests for emphysema    pulmonary function test used for copd is known as    lung function test interpretation copd