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| Application Effect of Acetylcysteine Nebulization Combined with Oscillatory Expectoration in Elderly Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease |
| MAO Meixiang, ZHANG Yu |
| First-author's address: Third People's Hospital of Jiujiang City, Jiangxi Province, Jiujiang 332000, China |
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