1. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
2. Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
3. Department of Health Sciences Research, Mayo Clinic, Jacksonville, Florida
4. Qiagen Sciences Research and Development, Qiagen Inc, Hilden, Germany
5. Department of Medicine, Mayo Clinic, Jacksonville, Florida
6. Department of Medical Oncology, Mayo Clinic, Rochester, Minnesota