Comment on

• Complementation of placental defects and embryonic lethality by trophoblast-specific lentiviral gene transfer.

  Okada Y, Ueshin Y, Isotani A, Saito-Fujita T, Nakashima H, Kimura K, Mizoguchi A, Oh-Hora M, Mori Y, Ogata M, Oshima RG, Okabe M, Ikawa M. Okada Y, et al. Nat Biotechnol. 2007 Feb;25(2):233-7. doi: 10.1038/nbt1280. Epub 2007 Jan 14. Nat Biotechnol. 2007. PMID: 17220877