[1] Mayo Clin, Div Primary Care Internal Med, Rochester, MN 55905 USA
[2] Mayo Clin, Mayo Grad Sch Med, Coll Med, Internal Med Residency Program, Rochester, MN 55905 USA
[3] Univ Colorado, Hlth Sci Ctr, Hematol & Oncol Fellowship Program, Denver, CO USA
[4] Mayo Clin, Div Gen Internal Med, Rochester, MN 55905 USA
[5] Mayo Clin, Div Biomed Stat & Informat, Rochester, MN 55905 USA