| Cell type | 
        Protocol 
          Duration  | 
        Phase I - Endoderm induction factors | 
        Phase II - Hepatic induction factors | 
        Phase III - Hepatic maturation factors | 
        Reference  | 
      
      
        | iPSCs | 
        12 days  | 
        Day 1-3;   
          activin A (100 ng/mL),  
          Wnt 3a (50 ng/mL), HGF (10 ng/mL). | 
        Day 4-7; L-glutamine (1 mM),    NAA (1%),  2-Mercaptoethanol (0.1 mM), DMSO (1%). | 
        Day 8-12;  
          OSM (20 ng/mL),  
          Dexamethasone (0.5 μM), ITS premix (50 mg/mL). | 
        Chen et al. [49]  | 
      
      
        | iPSCs | 
        25 days | 
        Day 1-3;  
          CHIR99021 (3 μM),  
          Ly294002 (10 μM),  
          Activin (100 ng/ml),  
          FGF2 (40 ng/ml), 
          BMP4 (10 ng/ml). | 
        Day 4-8;  
          Activin A (100 ng/ml), FGF2 (40 ng/ml),  
          and B27. | 
        Day 9-25;  
          HGF (20 μg/ml),  
          OSM (10 μg/ml). | 
        Rashid et al. [36]  | 
      
      
        | hESCs | 
        20 days | 
        Day 1-5;  
          Activin (100 ng/mL),   
          FGF2 (20 ng/mL),   
          BMP4 (10 ng/mL),   
          LY294003 (10  μM). | 
        Day 6-10;  
          FGF10 (50 ng/mL), Retinoic acid (10 7 M),  SB431542 (10  μM). | 
        Day 11-20;  
          FGF4 30 ng/ml,   
          HGF 50 ng/mL,   
          EGF 50 ng/Ml. | 
        Touboul et al. [46]  | 
      
      
        | hESCs | 
        18 days | 
        Day 1-3;  
          Activin A (100 ng/ml), ITS (1%). | 
        Day 4-8;  
          FGF4 (30 ng/ml),   
          BMP2 (20 ng/ml). | 
        Day 9-18; HGF (20 ng/ml) for 5 days, subsequently OSM (10    ng/ml),  
          dexamethasone (0.1 μM). | 
        Cai et al.[41]  | 
      
      
        | hESCs | 
        14 days  | 
        Day 1-3;  
          Activin A (100ng/mL),  
          FGF-2 (100ng/ml).  | 
        Day 4-11; 10% FBS or KSR, NAA (1 mM) L-glutamine, 1% DMSO, HGF    (100 ng/mL). | 
        Day 11-14;  10% FBS or    KSR, NAA (1 mM), 
          L-glutamine, dexamethasone (10−7 M). | 
        Basma et al. [42]  | 
      
      
        | hESCs or iPSCs | 
        21 days | 
        Day 1-4;  
          Activin-A (100 ng/ml),  
          b-FGF (8 ng/ml),  
          Wnt-3A (25 ng/ ml). | 
        Day 5- 10;  
          FGF-10 (50 ng/ml),  
          Retinoic acid (0.1 mM),  
          SB431542 (1 mM). | 
        Day 11-21; 
          FGF-4 (30 ng/ml),  
          EGF (50 ng/ml),  
          HGF (50 ng/ml). | 
        Wu et al.[75]  | 
      
    
HGF: hepatocyte growth factor; NAA: non-essential amino acids; DMSO: dimethyl sulfoxide; OSM: Oncostatin M; ITS: insulin-transferrin-selenium; FGF: fibroblast growth
factor; BMP: bone morphogenetic protein; EGF: epidermal growth factor; FBS: fetal bovine serum; KSR: knockout serum