Pengaruh Kombinasi Sel Punca Mesenkimal Tali Pusat Dan Vesikel Ekstraseluler Terhadap Fibrosis Hati (Skor Laenec), Penanda Cedera Hati (Ast Dan Alt) Serta Hepatocyte Growth Factor Pada Model Tikus Ligasi Duktus Bilier = The Effect Of Umbilical Cord Mesenchymal Stem Cell And Extracellular Vesicle Combination On Liver Fibrosis (Laenec Score), Liver Injury Marker (Ast And Alt) And Hepatocyte Growth Factor On Bile Duct Ligation Rat Model