Caniggia, IsabellaLye, Stephen J.Cross, James C.2011-08-172011-08-171997-0924. Caniggia I, Lye SJ, Cross JC (1997). Activin is a local regulator of cytotrophoblast cell differentiation. Endocrinology 138:3976-3986.http://hdl.handle.net/1880/48711This article has been uploaded according to The Endocrine Society publisher policy posted on SHERPA/RoMEO, August 17, 2011.engActivin Is a Local Regulator of Human Cytotrophoblast Cell Differentiationjournal article10.11575/PRISM/35590