1Division for Endoscopy, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
2Center for Gastroenterology, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
3Department of Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
4Center for Rheumatology, Clinical Research Institute, National Hospital Organization Kyushu Medical Center, Fukuoka, Japan
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