1. National Research Centre for the Working Environment, Lersø Parkalle 105, Copenhagen 2100, Denmark
2. The Copenhagen City Heart Study, Bispebjerg and Frederiksberg Hospital, Copenhagen University Hospital, Nordre Fasanvej 57, Hovedvejen, Indgang 5, Frederiksberg 2000, Denmark
3. The Copenhagen General Population Study, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
4. Department of Clinical Biochemistry, Herlev and Gentofte Hospital, Copenhagen University Hospital, Herlev, Denmark
5. Faculty of Health and Medical Sciences, University of Copenhagen, Denmark