title: Effect of esophageal cancer- and stomach cancer-preventing vinegar on N-nitrosoproline formation in the human body.
authors.affiliation: Xian-Ke Guo, 150 Central Hospital of PLA, Luoyang 471031, Henan Province, China.
authors.forename: X K
authors.initials: XK
authors.lastname: Guo
authors.affiliation: Xian-Ke Guo, 150 Central Hospital of PLA, Luoyang 471031, Henan Province, China.
authors.forename: T J
authors.initials: TJ
authors.lastname: Wang
authors.affiliation: Xian-Ke Guo, 150 Central Hospital of PLA, Luoyang 471031, Henan Province, China.
authors.forename: J F
authors.initials: JF
authors.lastname: Gu
keywords: Esophageal neoplasms; Gas chromatography; N-nitrosoproline; Stomach neoplasms; Vinegar