title: Double carcinomas simultaneously identified in biliary system.
authors.affiliation: Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Tianyi
authors.initials: T
authors.lastname: Chi
authors.affiliation: Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Yongchang
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Department of Liver Surgery, Peking Union Medical College (PUMC) Hospital, PUMC, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Lu