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Severe fatigue, exercise intolerance and smoking are independently associated with low physical in #COPD http://t.co/OM91puWQit
Severe fatigue, exercise intolerance and smoking are independently associated with low physical in #COPD http://t.co/OM91puWQit
Severe fatigue, exercise intolerance and smoking are independently associated with low physical in #COPD http://t.co/OM91puWQit