Author/Authors :
ogawa, masahiro nihon university - school of medicine - department of medicine, division of gastroenterology and hepatology, Tokyo, Japan , kanda, tatsuo nihon university - school of medicine - department of medicine, division of gastroenterology and hepatology, Tokyo, Japan , moriyama, mitsuhiko nihon university - school of medicine - department of medicine, division of gastroenterology and hepatology, Tokyo, Japan
