Association between TNFα1031 T>C polymorphisms and helicobacter pylori infection: a metaanalysis
Pu Ning1a， Wang Jing2， Ka Shiquan1b， Tang Zhigang1c
Clinical Focus . 2016, (11): 1248 -1253 .  DOI: 10.3969/j.issn.1004-583X.2016.11.022