[1] Marshfield Clin, Dept Gastroenterol, Midwest Pancreaticobiliary Grp, Marshfield, WI 54449 USA
[2] St Lukes Hosp, Pancreat Biliary Ctr, Dept Gastroenterol, Milwaukee, WI USA
[3] St Josephs Hosp, Milwaukee, WI USA
[4] Indiana Univ, Med Ctr, Indianapolis, IN USA
[5] Washington Univ, Sch Med, St Louis, MO USA
[6] Hennepin Cty Med Ctr, Minneapolis, MN 55415 USA
[7] Univ Minnesota, Med Ctr, Minneapolis, MN 55455 USA
[8] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA
[9] Rockford Gastroenterol Associates, Rockford, IL USA
[10] Poudre Valley Hosp, Ft Collins, CO USA