Interventions: Genetic: protein analysis; Genetic: proteomic profiling; Other: biologic sample preservation procedure; Other: laboratory biomarker analysis; Other: medical chart review; Procedure: diagnostic colonoscopy; Procedure: diagnostic endoscopic procedure; Procedure: diagnostic endoscopic surgery; Procedure: diagnostic surgical procedure; Procedure: endoscopic surgery; Procedure: screening colonoscopy
Sponsors: Vanderbilt University Medical Center; National Cancer Institute (NCI)
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