RT Journal Article SR Electronic T1 Incidence and patterns of bone marrow involvement in Ewing's sarcoma JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1286 OP 1288 VO 25 IS 9 A1 Al-Amoudi, Saeed A1 Owaidah, Tarek A1 Al-Dayel, Fouad YR 2004 UL http://smj.org.sa/content/25/9/1286.abstract AB