Nilsson Ulf, Vanfleteren Lowie E G W
Dept of Public Health and Clinical Medicine, Section of Medicine, Umeå University, Umeå, Sweden ulf.nilsson@umu.
COPD Center, Dept of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, Gothenburg, Sweden.
Eur Respir J. 2020 Feb 27;55(2). doi: 10.1183/13993003.02447-2019. Print 2020 Feb.