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The phrase "are present in about" is correct and usable in written English.
It can be used when discussing the occurrence or availability of something within a certain quantity or percentage.
Example: "These species are present in about 30% of the surveyed areas."
Alternatives: "are found in approximately" or "exist in roughly".
Exact(53)
Telangiectasias and/or varicose veins are present in about 33% of adult women and 15% of adult men.
AFA are present in about 4% of patients with SSc and are mutually exclusive with ACA, anti-Scl-70, and anti-RNAP [ 96].
TAG and SE are present in about equal amounts in LDs (Daum et al. 2007b; Czabany et al. 2008; Rajakumari et al. 2008; Connerth et al. 2009; Grillitsch et al. 2011).
The results show that the Tcast2a + Tcast2c repeats are present in about 2,000 copies in some strains (GA2, 43, 57, and 61) and in about 4,000 copies in strains like 50 and 52, per haploid genome.
It has been reported that anti-fibrillin-1 antibodies are present in about 34%to80%0% of SSc patients and can exert profibrotic functions through TGF-β-mediated mechanisms [ 21].
Although gallstones are present in about 85 percent of gallbladder cancer patients, however, only a small fraction of individuals with gallstones develop cancer.
Similar(7)
A history of trauma is present in about 60% of cases.
A ZB-motif was present in about 44%9393) cases in the database.
As reported in another study [ 23], wasting syndrome was present in about 12% of the patients.
The transposase ISBma2 was present in about 40 50 copies in B. mallei and about 5 copies in B. pseudomallei.
Although subjects with major depressive disorder were excluded, depression is present in about 34% of FM patients [ 46].
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com