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Publisher
- baishideng publishing group6
- korean society of gastroenterology6
- korean society of gastrointestinal endoscopy6
- elsevier bv5
- baishideng publishing group inc.4
- american society of clinical oncology (asco)3
- jin publishing & printing co.3
- gastroenterology council for gut and liver2
- korean society of neurogastroenterology & motility2