Disease 'Activity', 'Severity' and 'Impact': Interrelationships in COPD; Is a Measure of Disease 'Activity' the Holy Grail for COPD, or a Variable Impossible to Quantify?
Disease 'Activity', 'Severity' and 'Impact': Interrelationships in COPD; Is a Measure of Disease 'Activity' the Holy Grail for COPD, or a Variable Impossible to Quantify?