CCL18 and neoplasm: Phosphatidylinositol transfer protein (PITPMN3), a non‐GPCR with six transmembrane domains, is reported to be a functional receptor for CCL18 in the context of tumor cell invasion 127, although, more conventionally, CCL18 also binds to, and directs leukocyte migration through, the cCKR CCR8 128.