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The online version of the original article can be found at 10.1038/nbt0287-128
The online version of the original article can be found at 10.1038/nbt0387-195
The online version of the original article can be found at 10.1038/nbt0387-239
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Erratum. Nat Biotechnol 5, 512 (1987). https://doi.org/10.1038/nbt0587-512c
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DOI: https://doi.org/10.1038/nbt0587-512c