%0 Dissertation or Thesis %T Improving the validity of nonexperimental comparative effectiveness research: The impact of calendar time on prescribing of novel chemotherapeutic therapies for stage III colon cancer %I University of North Carolina at Chapel Hill %R http://localhost/files/2227mq29s %G http://id.loc.gov/vocabulary/iso639-2/eng %[ 2019-03-19 %9 Dissertation %~ Carolina Digital Repository %W UNC-Chapel Hill