Retraction statement: ‘Antitumor activity of human γδ T cells transducted with CD8 and with T-cell receptors of tumor-specific cytotoxic T lymphocytes’ by Takeshi Hanagiri, Yoshiki Shigematsu, Koji Kuroda, Tetsuro Baba, Hironobu Shiota, Yoshinobu Ichiki, Yoshika Nagata, Manabu Yasuda, Tomoko So, Mitsuhiro Takenoyama and Fumihiro TanakaThe above article in Cancer Science (doi: 10.1111/j.1349-7006.2012.02337.x), published online on 6 July 2012 in Wiley Online Library (http://onlinelibrary.wiley.com/), has been retracted by agreement between the authors, the journal Editor in Chief, Yusuke Nakamura, and Wiley Publishing Asia Pty Ltd. The retraction has been agreed due to lack of agreement between the co-authors and an unlisted author whose claim to authorship could not be solved.