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Chikara IWAI
Digestive Medicine, Sakuragaoka Central Hospital
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Hiroshi KATO
Digestive Medicine, Sakuragaoka Central Hospital
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Keijiro ISHIZUKA
Digestive Medicine, Sakuragaoka Central Hospital
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Kiyoshi KOZASA
Endoscopic Research Center of The Itabashi Doctor's Society
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Masazumi ISHIKAWA
Endoscopic Research Center of The Itabashi Doctor's Society
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Hanzo KUROSAKA
Endoscopic Research Center of The Itabashi Doctor's Society