[1] Mayo Clin, Div Endocrinol Diabet & Metab, Rochester, MN USA
[2] Mayo Clin, Div Clin Trials & Biostat, Dept Quantitat Hlth Sci, Rochester, MN USA
[3] Mayo Clin, Coll Med & Sci, Rochester, MN USA
[4] Mayo Clin, Div Med Oncol, Rochester, MN USA
[5] Mayo Clin, Div Gastroenterol & Hepatol, Rochester, MN USA
[6] Mayo Clin, Div Gen Internal Med, Rochester, MN USA