Randomized phase II trial comparing amrubicin with topotecan in patients with previously treated small-cell lung cancer: North Japan lung cancer study group trial 0402

Akira Inoue, Shunichi Sugawara, Koichi Yamazaki, Makoto Maemondo, Toshiro Suzuki, Kazunori Gomi, Shingo Takanashi, Chieko Inoue, Minoru Inage, Hiroshi Yokouchi, Hiroshi Watanabe, Toumei Tsukamoto, Yasuo Saijo, Osamu Ishimoto, Fumihiro Hommura, Toshihiro Nukiwa