1. 1Respiratory Medicine, Allergology, and Palliative Medicine, Department of Clinical Sciences Lund, Lund University and Skåne University Hospital, Lund, Sweden
2. 2Division of Hematology, Department of Medicine, UNC Blood Research Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC
3. 3Department of Clinical Sciences Malmö, Center for Primary Health Care Research, Lund University/Region Skåne, Malmö, Sweden