筛选: Department / Specialty Clinical Research Curriculum Program 删除限定条件 Department / Specialty: Clinical Research Curriculum Program Keyword case-control study 删除限定条件 Keyword: case-control study Keyword colon cancer 删除限定条件 Keyword: colon cancer Research Field Health Sciences, Epidemiology 删除限定条件 Research Field: Health Sciences, Epidemiology Research Field Health Sciences, Public Health 删除限定条件 Research Field: Health Sciences, Public Health