Retraction

杨柳

Vol. 146, No. 4, August 23, 1999. Pages 791–800.$ j1 u# u. y1 ]! j+ n4 ~
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Drs. Tanaka, Yasuda, and Todokoro retract the above referenced manuscript. An investigation by RIKEN determined that some of the experimental data had been falsified. Details of the investigation are available at http://www.riken.jp/r-world/info/release/press/2004/041224/index_e.html.(Shuji Kotani, Hirofumi Tanaka, Hideyo Ya)