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Exact(60)
Doctors operated but were unable to determine the cause.
Despite repeated requests, Pentagon auditors said they were unable to determine why the payments were made.
Researchers said they were unable to determine how many were younger than 16.
Government science advisers were unable to determine whether the protein, known as Cry9C, could cause allergies.
Health officials said they were unable to determine if the outbreak was likely to spread further.
However, scientists were unable to determine the exact location of the X-rays.
The remaining 80% admitted that they were unable to determine their raw materials' country of origin.
But until now, they were unable to determine whether Y.
We were unable to determine a cutoff value below which benign endometrial pathology could be excluded.
Both spectator and reader were unable to determine the performer's identity.
Pathologists were unable to determine extrinsic tongue muscle invasion in post-formalin-fixed samples.
More suggestions(16)
were unable to achieve
were unable to corroborate
were unable to infer
were unable to discover
were unavailable to determine
were unable to establish
were unable to trace
were unable to discern
were unable to regulate
were capable to determine
were unable to attach
were insufficient to determine
were impossible to determine
were unable to have
were unable to implement
were unable to develop
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com