To determine to what extent the observed effects are EV‐mediated or are a consequence of cell intrinsic changes, animals were implanted with two control (control), two GABARAPL1 knockdown (shGABARAPL1), or one GABARAPL1 knockdown combined with one control tumour on the contralateral flank (rescue). The gene discussed is GABARAPL1; the disease is neoplasm.