@phdthesis{oai:nagoya.repo.nii.ac.jp:00027597,
 author = {Akashi, Kumiko and 明石, 久美子},
 month = {Mar},
 school = {名古屋大学, Nagoya University},
 title = {Surgery for perihilar cholangiocarcinoma from a viewpoint of age: Is it beneficial to octogenarians in an aging society?},
 year = {2019}
}