... of the molecular mechanisms of action of this polymorphism. Because these results were based on the low frequency of A/A, they might be inconsistent due to the random errors. Studies of a ... with the risk of Helicobactor pylori infection and gastric atrophy Yasuyuki Goto 1, Takafumi Ando 2, Kazuko Nishio 1, Sayo Kawai 1, Yoshiko Ishida 1, Mariko Naito 1, Hidemi Goto ... and A/A genotypes together may increase the risk for gastric atrophy. The biological mechanism of this polymorphism remains to be elucidated. In addition, individuals with the PTPN11 G/G...