1. Department of Molecular Genetics; University of Texas Southwestern Medical Center; Dallas TX
2. McDermott Center for Human Growth and Development; University of Texas Southwestern Medical Center; Dallas TX
3. Department of Clinical Biochemistry; Copenhagen University Hospital; Copenhagen Denmark
4. Department of Cardiology and Radiology, Rigshospitalet; Copenhagen University Hospital; Copenhagen Denmark
5. Department of Clinical Biochemistry and the Copenhagen General Population Study, Herlev and Gentofte Hospital; Copenhagen University Hospital; Copenhagen Denmark
6. The Copenhagen City Heart Study, Frederiksberg Hospital; and the Copenhagen General Population Study, Herlev and Gentofte Hospital, Copenhagen University Hospitals; Copenhagen Denmark
7. Lawrence Berkeley National Laboratory; Berkeley CA
8. Howard Hughes Medical Institute; University of Texas Southwestern Medical Center; Dallas TX