| Privacy concerns or private data | | | | | |
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| Lack of standardization of data | | | | | |
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| Lack of standard metadata describing the data | | | | | |
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| Lack of curated community databases | | | | | |
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| Lack of storage (the data we collect are too massive to archive) | | | | | |
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| Lack of enforcement by journals or funding agencies | | | | | |
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| Other researchers who refuse to share data after publication | | | | | |
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| Other | | | | | |
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