[1] Mayo Clin, Coll Med, Dept Internal Med, Div Hematol, Rochester, MN 55905 USA
[2] Mayo Clin, Coll Med, Dept Internal Med, Div Gen Internal Med, Rochester, MN 55905 USA
[3] Mayo Clin, Coll Med, Dept Internal Med, Div Primary Care Internal Med, Rochester, MN 55905 USA
[4] Mayo Clin, Coll Med, Dept Internal Med, Div Vasc Med, Rochester, MN 55905 USA
[5] Mayo Clin, Coll Med, Dept Internal Med, Div Cardiovasc Dis, Rochester, MN 55905 USA