Roh Sung-il, chairman of the board at Mizmedi Hospital and a co-author of the article, wipes tears during his press conference in Seoul, Friday, Dec. 16, 2005. Roh repeated his accusations that South Korean stem cell pioneer Hwang Woo-suk had pressured a lab worker to forge evidence.(AP Photo/Yonhap, Seong Yeon-jae)
A South Korean stem cell researcher Hwang Woo-suk, left, Gerald Schatten of the University of Pittsburgh School of Medicine, look at Snuppy, the first successfully cloned dog, after press conference at the Seoul National University in a file photo from Aug. 3, 2005. If South Korean scientist Hwang Woo-suk falls from grace, he'll take U.S. stem cell researcher Gerald Schatten with him. In May, Schatten had the honor of serving as 'senior author' on Hwang's groundbreaking cloning report. That honor has now turned into a curse for the University of Pittsburgh researcher and his already checkered scientific reputation, his involvement with Hwang is not his first brush with scientific controversy. School officials say he's likely to be formally reprimanded once an internal school investigation is concluded. (AP Photo/Ahn Young-joon, File)