Department of Gastroenterology;
Toranomon Hospital Kajigaya;
1-3-1 Kajigaya;
Takatsu-ku;
Kawasaki;
Kanagawa 213-8587;
Japan;
Division of Gastroenterology;
Institute for Adult Diseases;
Asahi Life Foundation;
1-6-1 Marunouchi;
Chiyoda-ku;
Tokyo 100-0005;
Japan;
Department of Gastroenterology;
Tokyo Metropolitan Police Hospital;
Department of Gastroenterology;
Yokohama City University;
Helicobacter; pylori; Eradication; First-line; treatment; Non-bismuth; quadruple; therapy; Prospective; study;