GDF15 and neoplasm: The Open Access Crown Biotech Oncology Databases (https://www.crownbio.com/oncology/oncology-databases) indicate a median of 45.9 fragments per kilobase of exon model per million reads mapped (FKPM) for gdf15 across 544 patient-derived cell lines, of 18.4 FKPM across 1141 established human cancer cell lines, but of only 1.9 FKPM across 125 murine tumor cell lines.