1. Department of Medicine, Mayo Clinic, Jacksonville, FL, USA
2. Department of Psychiatry, Mayo Clinic, Rochester, MN, USA
3. Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
4. Minnesota State University, Mankato Undergraduate University, Mankato, MN, USA
5. University of St. Thomas, St. Paul, MN, USA