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The phrase "called in" is correct and can be used in written English.
It is usually used to indicate that something is being summoned, often for help in a difficult situation. For example, "The mayor called in the police when riots broke out in the city."
Dictionary
called in
verb
Past of call in
Exact(59)
Vendors called in sightings.
Eventually, Lazarides called in.
"Nooooooo!" they called, in unison.
They called in Mr Kohl.
Many listeners had called in.
The F.B.I. was called in.
Ikey! they called in turn.
I called in an expert.
Cattle called in dewy fields.
They called in a witchdoctor.
Similar(1)
The technique is called in-line deduplication.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com