title: Cell differentiation.
authors.affiliation: Rik Derynck, Department of Growth and Development, University of California at San Francisco, San Francisco, California 94143-0640, USA. Erwin F Wagner, Research Institute of Molecular Pathology, Dr Bohr Gasse 7, A-1030 Vienna, Austria.
authors.initials: R
authors.lastname: Derynck
authors.initials: EF
authors.lastname: Wagner