Peretinoin, an Acyclic Retinoid, Inhibits Hepatitis B Virus Replication by Suppressing Sphingosine Metabolic Pathway In Vitro oleh Kazuhisa Murai, Takayoshi Shirasaki, Masao Honda, Ryogo Shimizu, Tetsuro Shimakami, Saki Nakasho, Natsumi Shirasaki, Hikari Okada, Yoshio Sakai, Taro Yamashita, Shuichi Kaneko