A Questionnaire Survey Study for Establishment of Surveillance and Prevention Through the Analysis of Epidemiologic Risk Factors in Patients With Biliary Tract Cancers
A Questionnaire Survey Study for Establishment of Surveillance and Prevention Through the Analysis of Epidemiologic Risk Factors in Patients With Biliary Tract Cancers
The purpose of this study is:
Inclusion Criteria:
Study population :
Control :
Exclusion Criteria: