The nutritional status and plasma free amino acid (PFAA) of 17 patients with chronic obstructive pulmonary disease(COPD) were assessed with and without acute lower respiratory tract infection.
对17例并发急性下呼吸道感染的慢性用塞性肺病（COPD）患者进行了营养状态评定和血浆游离氨基酸测定。
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