RT Journal Article SR Electronic T1 Pulmonary exacerbations as indicators of progression of lung disease in young children with CF JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 608 OP 609 DO 10.1136/thoraxjnl-2013-203262 VO 68 IS 7 A1 Don B Sanders A1 Christopher Hooper Goss YR 2013 UL http://thorax.bmj.com/content/68/7/608.abstract AB