In a randomized, double-blind phase II clinical trial (NCT01063517), the combination of olaparib plus paclitaxel in patients with recurrent or metastatic GC with disease did not meet the primary endpoint of progression-free survival (overall population: hazard ratio [HR], 0.80; median PFS, 3.91 v 3.55 months, respectively; ATM low population: HR, 0.74; median PFS, 5.29 v 3.68 months, respectively). Here, ATM is linked to gastric cancer.