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Additional special arrangements may be made for clinical programs , such as special interns . The ability to maintain subject confidentiality in a research context may not follow clinical standards , such as legal protections for disclosure of information . In that regard , several large clinical trials , such as the Prostate , Lung , Colorectal and Ovarian Cancer Screening Trial , and the work of the NCI Integrative Cancer Biology Program , the Lung Cancer Specialized Programs of Research Excellence , and our National Lung Screening Trial will play vital roles . " Clinical trials , such as the ones McDaris participated in , also are called clinical research or research studies .