RT Journal Article SR Electronic T1 Proliferating cell nuclear antigen index and nm23 expression in osteosarcoma in relation to disease- free survival and tumor grade JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1475 OP 1477 VO 26 IS 9 A1 Unal, Vuslat S. A1 Ayhan, Ayse A1 Tokgozoglu, Mazhar A. YR 2005 UL http://smj.org.sa/content/26/9/1475.abstract AB