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Quote from a Japanese clinical trial report:

METHOD: An observational study was conducted on patients who relapsed after primary systemic therapy with TZM using the central registration system. The primary end point was progression-free survival (PFS). Secondary end points consisted of the response rate, overall survival (OS), and safety.

Is there some state-wide centralized system in Japan for registering all clinical trial participants? If not, what is the meaning of "the central registration system"?

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