%0 Journal Article %T Analysis of Extrahepatic Multiple Primary Malignancies in Patients with Hepatocellular Carcinoma according to Viral Infection Status %A Keita Kai %A Atsushi Miyoshi %A Kenji Kitahara %A Masanori Masuda %J International Journal of Hepatology %D 2012 %I %R 10.1155/2012/495950 %U http://dx.doi.org/10.1155/2012/495950