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by Yang, Gi-chul; Ao, Sio-Iong; Gelman, Len
by Ao, Sio-Iong; Yang, Gi-chul; Gelman, Len
by Ao, Sio-Iong; Gelman, Len; Kim, Haeng Kon
by Ao, Sio-long; Gelman, Len; Kim, Haeng Kon
by Ao, Sio-Iong; Gelman, Len
by Gelman, Len
by Ao, Sio-long; Gelman, Len