PT - JOURNAL ARTICLE AU - Taylor-Robinson, David AU - Whitehead, Margaret AU - Diderichsen, Finn AU - Olesen, Hanne Vebert AU - Pressler, Tania AU - Smyth, Rosalind AU - Diggle, Peter TI - Author's response: understanding the natural progression in %FEV<sub>1</sub> decline in patients with cystic fibrosis: a longitudinal study AID - 10.1136/thoraxjnl-2012-202954 DP - 2013 Mar 01 TA - Thorax PG - 294--295 VI - 68 IP - 3 4099 - http://thorax.bmj.com/content/68/3/294.2.short 4100 - http://thorax.bmj.com/content/68/3/294.2.full SO - Thorax2013 Mar 01; 68