RT Journal Article SR Electronic T1 Patients with acute exacerbations of COPD saw anxiety as a sign, rather than cause, of breathlessness JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 61 OP 61 DO 10.1136/ebn.8.2.61 VO 8 IS 2 YR 2005 UL http://ebn.bmj.com/content/8/2/61.abstract AB