Mouse-musashi-1, an RNA-binding protein, is expressed in the mouse hepatic progenitor cells/early hepatocytes during liver development: Shinichi Kiso, Graduate School of Medicine, Osaka University, Osaka Japan; Sumio Kawate, Yamagata University School of Medicine, Yamagata Japan; Shinji Tamura, Jun-Ichiro Miyagawa, Yoshiaki Doi, Takao Nanmo, Ayuko Saeki, Yoshihiro Kamada, Takako Kawasaki, Shin-Ichi Sakakibara, Graduate School of Medicine, Osaka University, Osaka Japan; Hideyuki Okano, School of Medicine, Keio University, Tokyo Japan; Yuji Matsuzawa, Graduate School of Medicine, Osaka University, Osaka Japan