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While spirometric evidence of airflow obstruction is required to make a COPD diagnosis, spirometry is underutilized in clinical settings, 20,54,55 and the lack of spirometry in the PATH Study along with the potential of diagnostic and recall bias associated with self-report may introduce imprecision in the COPD diagnosis

Qualitative analysis After reading the textual corpus at baseline and at follow-up at 6 months, the researchers established different codes or categories that defined the meaning of each of the segments of the text, generating a list of qualities of the smoker

Meltzer, L

The brass has a lovely patina