Christer Janson professor in respiratory medicine, Kjell Larsson professor in respiratory medicine, Karin H Lisspers general practitioner, Björn Ställberg general practitioner, Georgios Stratelis senior medical advisor, Helena Goike research scientist et al
Janson C, Larsson K, Lisspers K H, Ställberg B, Stratelis G, Goike H et al.
Pneumonia and pneumonia related mortality in patients with COPD treated with fixed combinations of inhaled corticosteroid and long acting β2 agonist: observational matched cohort study (PATHOS)
BMJ 2013; 346 :f3306
doi:10.1136/bmj.f3306