1. Department of Medicine, University of California , San Francisco, San Francisco, CA 94143 , USA
2. Department of Epidemiology & Biostatistics, University of California , San Francisco, San Francisco, CA 94143 , USA
3. Kaiser Permanente Southern California , Downey, CA 90242 , USA
4. Department of Radiology and Biomedical Imaging, University of California , San Francisco, San Francisco, CA 94143 , USA
5. Rockwool Foundation , Copenhagen 1472 , Denmark
6. Department of Public Health, University of Southern Denmark , Odense 5000 , Denmark
7. Department of Radiology, Aarhus University , Aarhus 8200 , Denmark
8. Departments of Radiology and Clinical Medicine, Aalborg University Hospital , Aalborg 9100 , Denmark
9. Department of Radiology, Copenhagen University Hospital , Bispebjerg and Frederiksberg 2400 , Denmark
10. Department of Clinical Research, Odense Patient Data Explorative Network, University of Southern Denmark , Odense 5000 , Denmark
11. Department of Medicine, Holbæk Hospital , Holbæk 4300 , Denmark