Chronic Gastritis

• Hanyang University Medical Center — Seoul, South Korea

• Yonsei University Health System, Severance Hospital, IRB — Seoul, South Korea

• Chung-Ang University Hospital — Seoul, South Korea

• Korea University Guro Hospital — Seoul, South Korea

Not specified

• Xijing Hosipital of Digestive Disease — Xi'an, Shaanxi, China

Not specified

• Inje University Busanpaik hospital — Busan, Busangjin, South Korea
• Chonbuk National University Hospital — Jeonju, Deokjin-gu, South Korea
• Chonnam National University Hospital — Guangju, Dong-gu, South Korea
• Wonju Severance Christian Hospital — Wŏnju, Ilsan-ro, South Korea

• Shanghai Changhai Hospital — Shanghai, China

• Division of Gastroenterology Department of Internal Medicine - Cipto Mangunkusumo Hospital, Faculty of Medicine University of Indonesia — Jakarta, Indonesia