[1] Texas Tech Univ, Hlth Sci Ctr, Dept Med, Lubbock, TX USA
[2] WEISS MEM HOSP, Dept Med, CHICAGO, IL USA
[3] Univ Hawaii, John A Burns Sch Med, Dept Med, Honolulu, HI USA
[4] Griffin Hosp, Derby, CT USA
[5] Albert Einstein Healthcare Network, Dept Med, Philadelphia, PA USA
[6] Mahidol Univ, Ramathibodi Hosp, Fac Med, Bangkok, Thailand
[7] Texas Tech Univ, Hlth Sci Ctr, Div Gastroenterol, Lubbock, TX USA
[8] Texas Tech Univ, Hlth Sci Ctr, Hematol & Oncol Dept, Lubbock, TX USA