Expression ratio of CCND1 to CDKN2A mRNA predicts RB1 status of cultured cancer cell lines and clinical tumor samples. - Mizuarai, Shinji; Machida, Takumitsu; Kobayashi, Tsutomu; Komatani, Hideya; Itadani, Hiraku; Kotani, Hidehito (Molecular Cancer, 2011)