2662072 ESFT Ewing sarcoma family of tumors 238 1948955 ESFTs Ewing's sarcoma family of tumors 17 913896 EFT Ewing's sarcoma family of tumors 15 2633408 EFTs Ewing's sarcoma family of tumors 8 939967 ESF Ewing's sarcoma family of tumors 1 2034338 EWSFT Ewing's sarcoma family of tumors 1