1 Department of Clinical Biochemistry, Section of Respiratory Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev DK-2730, Denmark; The Copenhagen General Population Study, Section of Respiratory Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev DK-2730, Denmark; Faculty of Health and Medical Sciences, Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark. Electronic address: yunuscol@gmail.com.
2 The Copenhagen General Population Study, Section of Respiratory Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev DK-2730, Denmark; Department of Internal Medicine, Section of Respiratory Medicine, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev DK-2730, Denmark; Faculty of Health and Medical Sciences, Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark; Department of Public Health, Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark.