RT Journal Article SR Electronic T1 Nurse-led cognitive behavioural therapy for treatment of anxiety in COPD JF ERJ Open Research JO erjor FD European Respiratory Society SP 00221-2018 DO 10.1183/23120541.00221-2018 VO 4 IS 4 A1 Abebaw Mengistu Yohannes YR 2018 UL http://openres.ersjournals.com/content/4/4/00221-2018.abstract AB