Expression of Concern: Gene trap analysis of germ cell signaling to Sertoli cells: NGF-TrkA mediated induction of Fra1 and Fos by post-meiotic germ cells

[This Expression of Concern relates to J. Cell Sci. (2001) 114, [435-443.][2]][2] Journal of Cell Science was alerted to duplicated HPRT blotsin Fig. 4A and Fig. 7C of this paper. The authors state that the conclusions of the paper are not affected by the duplicated control blots, but were unable