Which Individuals with Positive Family History of Gastric Can-cer Urgently Need Intensive Screening and Eradication of Heli-cobacter Pylori? A Systematic Review and Meta-Analysis - He, Gui; Ji, Xuanke; Yan, Yali; Wang, Kunyan; Song, Chunhua; Wang, Peng; Ye, Hua; Dai, Liping; Zhang, Jianying; Wang, Kaijuan (Iranian Journal of Public Health, 2021)