Clinical Prognostic Factors and Outcome in Pediatric Osteosarcoma: Effect of Delay in Local Control and Degree of Necrosis in a Multidisciplinary Setting in Lebanon oleh Bilal Abou Ali, Mayssa Salman, Khaled M. Ghanem, Fouad Boulos, Rachid Haidar, Said Saghieh, Samir Akel, Samar A. Muwakkit, Hassan El-Solh, Raya Saab, Hani Tamim, Miguel R. Abboud