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| Directory of open access journals | | | Science direct | | | Elsevier | | |
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| Springer open | | | Wiley online library | | | Omics international | | |
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| Taylor francis online | | | Oxford university press | | | Brill | | |
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THIEME | | | Bio med central | | | coaction | | |
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Cogent OA | | | Copernicus publications | | | Hindawi | | |
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| Frontiersin | | | Journal Prep | | | Karger | | |
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| Lund university | | | Copernicus publications | | | MDPI | | |
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| | | HighWire | | | | | |
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