FUT4 and neoplasm: Corroborating previously published data [25], subcutaneous injections of 4x105 CD15+ P17+ Ptch1lox/lox;GFAPcre isolated cells recapitulated tumour formation in 5/7 cases (125+/-38.28 days), while CD15- cell transplantation resulted in only 1/7 tumours (day 35, p = 0.064; S4E Fig).