Suyatna, F. D., and Nafrialdi Nafrialdi. “Determination of.TGFβ<sub>1 </sub&gt;Activity in Placental Extracts”. Medical Journal of Indonesia 7, no. 3 (July 1, 1998): 119-22. Accessed April 20, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/764.