TY  - RPRT
TI  - Introduction: what is TGF-beta?
AU  - M B Sporn
AU  - A B Roberts
PY  - 1991
DO  - 10.1002/9780470514061.ch1
UR  - https://pubmed.ncbi.nlm.nih.gov/2070680/
ID  - 2070680
ER  -