[1] Mayo Clin, Dept Internal Med, Div Gen Internal Med, Coll Med, Rochester, MN 55905 USA
[2] Mayo Clin, Dept Anat, Coll Med, Rochester, MN 55905 USA
[3] Mayo Clin, Program Professionalism & Eth, Rochester, MN 55905 USA
[4] Case Western Reserve Univ, Cleveland Clin, Cleveland Clin Lerner Coll Med, Cleveland, OH 44106 USA
[5] Mayo Clin, Dept Internal Med, Div Primary Care Internal Med, Coll Med, Rochester, MN 55905 USA
[6] Mayo Clin, Dept Hlth Sci Res, Div Biomed Stat & Informat, Coll Med, Rochester, MN 55905 USA