RT Journal Article SR Electronic T1 Comparison of spirometric thresholds in diagnosing smoking-related airflow obstruction: authors’ response JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1147 OP 1148 DO 10.1136/thoraxjnl-2014-206123 VO 69 IS 12 A1 Surya P Bhatt A1 George R Washko A1 Mark T Dransfield A1 Jessica C Sieren A1 John D Newell, Jr A1 Eric A Hoffman YR 2014 UL http://thorax.bmj.com/content/69/12/1147.abstract AB