Supplementary Table 2.

Biopsy results of upper endoscopy

Biopsy	Number
Chronic gastritis	168
Chronic gastritis, intestinal metaplasia, reparative change	45
Chronic duodenitis	12
Chronic ulcer	8
Low grade dysplasia, stomach	4
Hyperplastic polyp	7
Adenocarcinoma	3
Squamous cell carcinoma, esophagus	2
Etc. (squamous dysplasia, fundic gland polyp, chronic inflammation)	7
Total	256