?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ritzmann%2C+TA&rft.aufirst=TA&rft.aulast=Ritzmann&rft.date=2+July+2020&rft.atitle=A+retrospective+analysis+of+recurrent+pediatric+ependymoma+reveals+extremely+poor+survival+and+ineffectiveness+of+current+treatments+across+central+nervous+system+locations+and+molecular+subgroups&rft.title=Pediatric+Blood+%26+Cancer&rft.genre=article