RT Journal Article SR Electronic T1 Similarities and discrepancies between exacerbations of asthma and chronic obstructive pulmonary disease JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 803 OP 808 DO 10.1136/thx.53.9.803 VO 53 IS 9 A1 Leonardo Fabbri A1 Bianca Beghé A1 Gaetano Caramori A1 Alberto Papi A1 Marina Saetta YR 1998 UL http://thorax.bmj.com/content/53/9/803.abstract AB