Abstract
The Joint Editors-in-Chief have retracted this article [1]. An investigation by Kurume University has not been able to establish what the appropriate authorship should be because one of the authors, Yoshihiro Sato, is now deceased. As the appropriate authorship cannot be determined the Editors-in-Chief no longer have confidence in this article. Kurume University has also stated that it has not been possible to verify the data presented as none of the research material is available for investigation. We have not been able to contact Yoshitaka Ohta, Yoshiaki Honda, Masahide Kaji and Kotaro Oizumi about this retraction.
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