This is a leak, it is only a leak: It is not the official conclusion. But it appears that Hwang never cloned human embryos at all in the 2005 experiments, in which he fraudulently asserted to have successfully made 11 patient specific, cloned embryonic stem cell lines. If this is true, it is also probably true about his 2004 claim, meaning that he may never have manufactured human clones at all. It would also explain why his work has yet to be repeated by other researchers.