Global dissemination of minimally invasive living donor hepatectomy: What are the barriers?

Table 1 Biliary duct and portal vein variations

Biliary duct variations
A	Normal bifurcation (57%)
B	Trifurcation of 3 ducts (12%)
C	Right anterior (C1, 16%) or right posterior (C2, 4%) duct draining into common hepatic duct
D	Right posterior (D1, 5%) or right anterior (D2, 1%) duct draining into left hepatic duct
E	Absence of hepatic duct confluence (3%)
F	Drainage of right posterior duct into cystic duct (2%)
Portal vein variations
I	Classical anatomy
II	Trifurcation
III	Right posterior vein as first branch of main portal vein
IV	Segment VII branch separate branch of right portal vein
V	Segment VI branch separate branch of right portal vein