In addition, to examine the correlation between hub genes and long-term allograft survival, the following seven hub genes were found to be associated with the prognosis of GC patients using Kaplan Meier survival analysis and log-rank test: AR (P = 0.0097); MAPK4 (P = 0.0357); CALD1 (P = 0.0066); ABCG8 (P = 0.0211); ABCG4 (P = 0.0295); NAP1L2 (P = 0.0412); and GRIN2A (P = 0.0428). Here, CALD1 is linked to gastric cancer.