Developmental Biology. In the article “Derivation of pluripotent stem cells from cultured human primoridal germ cells” by Michael J. Shamblott, Joyce Axelman, Shunping Wang, Elizabeth M. Bugg, John W. Littlefield, Peter J. Donovan, Paul D. Blumenthal, George R. Huggins, and John D. Gearhart, which appeared in number 23, November 10, 1998, of Proc. Natl. Acad. Sci. USA (95, 13726–13731), the following disclosure statement was inadvertently omitted: “Geron, Inc. provided funding for the study described in this article. Under a Licensing agreement between Geron and Johns Hopkins University, the University and Dr. Gearhart are entitled to a share of sales royalty from Geron. Both the University and Dr. Gearhart own stock in Geron, the sale of which is subject to certain restrictions under University policy. Dr. Gearhart is also a consultant to Geron. The terms of this arrangement are being managed by the University in accordance with its conflict of interest policies.”