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Hi. I have viewed some OCOP posts and they mentioned the “expressed need” and “felt need”. I am so confused about these two concepts and wonder if anyone could kindly elaborate on the difference for me?

主頁>網上研討平台>Hi. I have viewed some OCOP posts and they mentioned the “expressed need” and “felt need”. I am so confused about these two concepts and wonder if anyone could kindly elaborate on the difference for me?