TY - JOUR T1 - Authors’ response<a href="pending:yes" l:rel="letter" l:ref-type="journal" hwp:journal="thoraxjnl" hwp:volume="63" hwp:fpage="936"> ARTICLE</a> JF - Thorax JO - Thorax SP - 936 LP - 937 VL - 63 IS - 10 AU - A Smyth AU - C Bertenshaw AU - S Lewis AU - I Choonara AU - A Watson Y1 - 2008/10/01 UR - http://thorax.bmj.com/content/63/10/936.2.abstract N2 - We welcome Dr Tai’s comments on our paper. We described a case control study of acute renal failure in cystic fibrosis (CF)1 and not a study designed to measure the prevalence, severity or risk factors for renal impairment. Patients with acute renal failure (ARF) were reported to us from 20 UK CF centres and clinical data were extracted retrospectively from the case notes. We therefore adopted a … ER -