TY - JOUR T1 - Authors' response JF - Thorax JO - Thorax SP - 464 LP - 464 DO - 10.1136/thoraxjnl-2012-201620 VL - 67 IS - 5 AU - Andrew Bush AU - Claire Hogg Y1 - 2012/05/01 UR - http://thorax.bmj.com/content/67/5/464.2.abstract N2 - We thank Dr Knowles and colleagues for their interest in our editorial.1 … ER -