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NCI Thesaurus
C20181
C80263
C80263
Level 2
Rationale
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C142705
Study Design Rationale
C171182
Protocol Treatment Arm Assignment Rationale
C181233
Brief Rationale for Protocol Change
C181234
Overall Rationale for Protocol Amendment
C185636
Treatment Modification Rationale
C203927
Study Rationale
C215608
Study Change Rationale
C218730
Rationale for Trial Estimand
C218731
Rationale for Trial Control Type
C218732
Rationale for Trial Duration
C218734
Rationale for Interim Analysis
C218752
Rationale for Investigational Trial Intervention Dose and Regimen
C218767
Study Subject Discontinuation Rationale
C219696
Trial Justification
Cross-system equivalences
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