FAAH and neoplasm: We also measured AEA, OEA and PEA amounts in the excised tumors by HPLC-MS, which showed that PEA, AEA and OEA levels were increased in tumor samples of mice treated with URB597 and co-treatment with RSL3 and URB597 but not RSL3 single treatment, which confirm the inhibition of FAAH (Figure S3E).