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Severe #COPD cases from Korea, Poland, and USA have substantial differences in respiratory symptoms and other #respiratory illnesses #lung https://t.co/QUfErL1QDZ https://t.co/gz8NnMVrXh
Severe #COPD cases from Korea, Poland, and USA have substantial differences in respiratory symptoms and other #respiratory illnesses #lung https://t.co/QUfErL1QDZ https://t.co/gz8NnMVrXh
Respiratory symptoms associated with severe COPD differ widely among continents. https://t.co/sxRyGorKrA https://t.co/PxpYTnmvrF