[1] Chulalongkorn Univ Hosp, Div Gastroenterol, Dept Med, Bangkok, Thailand
[2] Yangon Gen Hosp, Dept Med, Yangon, Myanmar
[3] Novel Sq Med Clin, Dept Med, Yangon, Myanmar
[4] Oita Univ, Dept Mol Pathol, Oita 87011, Japan
[5] Baylor Coll Med, Dept Med Gastroenterol, Houston, TX 77030 USA
[6] Michael E DeBakey VA Med Ctr, Houston, TX USA
[7] Thammasat Univ Hosp, Dept Med, Gastroenterol Unit, Bangkok, Thailand
[8] Natl Gastr Canc & Helicobacter Pylori Res Ctr, Bangkok, Thailand