1. Department of Clinical Physiology and Nuclear Medicine; Koege Hospital; Lykkebaekvej 1 DK-4600 Copenhagen Denmark
2. Department of Clinical Physiology and Nuclear Medicine; Hvidovre Hospital; Copenhagen Denmark
3. Department of Medicine; Koege Hospital; Copenhagen Denmark
4. Department of Clinical Biochemistry; Rigshospitalet; Copenhagen Denmark
5. Department of Biomedical Sciences, Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark