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  1. Medical quality control intervention for COPD patients in China: a cluster randomized, controlled trial
  2. Reproducibility of fluid-phase measurements in PBS-treated sputum supernatant of healthy and stable COPD subjects
  3. Factors contributing to hospitalization costs for patients with COPD in China: a retrospective analysis of medical record data
  4. Correlation and compatibility between surface respiratory electromyography and transesophageal diaphragmatic electromyography measurements during treadmill exercise in stable patients with COPD