We further investigated the functional status of HRR in FFPE tumors from PDX cohort‐1, scoring the percentage of RAD51‐positive tumor cells in S/G2‐phase of the cell cycle (geminin‐positive) following the protocol shown in Fig EV1B (Graeser et al, 2010; Naipal et al, 2014). Here, RAD51 is linked to neoplasm.