Factors associated with work productivity among people with COPD: Birmingham COPD Cohort
Kiran K Rai, Peymané Adab, Jon G Ayres, W Stanley Siebert, Steven S Sadhra, Alice J Sitch, David A Fitzmaurice, Rachel E Jordan
Occupational and Environmental Medicine Dec 2017, 74 (12) 859-867; DOI: 10.1136/oemed-2016-104014
