VHL and osteosarcoma: Renal carcinoma VHL-null cell line 786-O, human osteosarcoma p53-null cell line Saos-2, BJAB, DG75 and Louckes KSHV-negative type cell lines, and BC-3, BCBL-1, JSC-1 and BC-1 KSHV-positive cell lines (Cai et al., 2006)