SLC30A8 and gastric cancer: Five genes showed a negative correlaion between high expression and significant positive overall survival in GC patients, (SLC3A2: HR 1.77 [95% CI 1.34–2.34], P = 4e−05; SLC30A3: HR 1.61 [95% CI 1.36–1.91], P = 0.9e−08; SLC30A4: HR 1.44 [95% CI 1.16–1.79], P = 0.0010; SLC30A8: HR 1.44 [95% CI 1.16–1.79], P = 0.0008; and SLC30A10: HR 1.5 [95% CI 1.22–1.84], P = 8e−05).