1
Gastrointestinal Endoscopy Excellence Center, Department of Medicine, Faculty of Medicine,
Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross
Society, Bangkok, Thailand
1
Gastrointestinal Endoscopy Excellence Center, Department of Medicine, Faculty of Medicine,
Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross
Society, Bangkok, Thailand