RecruitingClinical trialCell-Free DNA Chromatin Immunoprecipitation (ChIP) for Diagnosing CancerThe goal of this research is to use chromatin immunoprecipitation, a method used to study protein-DNA interaction, as a tool to diagnose and prognose pancreatic ductal adenocarcinoma in human samples. This is a Non-Human Subject Research study. All participants are de-identified.