[1] Mayo Clin, Gastroenterol & Hepatol, Jacksonville, FL 32224 USA
[2] Univ Calif Los Angeles, Gastroenterol, Los Angeles, CA 90024 USA
[3] Univ Mississippi, Med Ctr, Med, University, MS 38677 USA
[4] Mayo Clin Florida, Jacksonville, FL USA
[5] Mayo Clin, Div Gastroenterol & Hepatol, Jacksonville, FL 32224 USA
[6] Mahidol Univ, Bangkok, Thailand