The phrase "as is established" is correct and usable in written English.
It can be used to refer to something that has been previously determined or accepted as a fact or principle.
Example: "The results of the study support the theory, as is established in previous research."
Alternatives: "as has been established" or "as previously established".
In contrast, literature for genome-wide alternative splicing in any system is still limited and, while AS is established to occur during lymphocyte activation, little is known about the role AS plays in immunity [25], [28] [32].
The clinical diagnosis of autism spectrum disorders and AS is established as a consensus diagnosis of a multiprofessional team following the recommendations of the NICE guidelines (National Institute for Health and Clinical Excellence: Autism in Adults: full guideline DRAFT (December 2011; http://www.nice.org.uk/guidance/conditions-and-diseases/mental-health-and-behavioural-conditions/autism).
It came to light in the Syrian town of Banias on the Golan Heights and was acquired not later than 1879 by the Chancellor of the French consulate in Beirut, as is established in the journal where its important Greek inscription was published in 1879.
Despite many recent reports on alternative splicing, studies of genome-wide alternative splicing in the immune system are still limited and, while alternative splicing (AS) is established to occur during lymphocyte activation, little is known about the role AS plays or its impact on immunity.
Although accumulating evidence for neurodevelopmental neurotoxicity of As is established, the causative mechanism remains unclear.
Further, if bone marrow toxicity had occurred, it is likely that declines in more than one blood cell type would have been observed, such as is established for benzene (discussed in Section 5.3.3), and that was not reported by the authors of any of the studies we reviewed.
With all successful relationships in China, the personal approach is critical, as is establishing a good rapport with the officials.
The toll company Atlanterhavsveien AS was established in 1970.
Most countries reported that their diagnostic capacity to confirm AS was established in 2004.
In this work, a quantitative risk assessment system (QR-AS) is established aiming at providing a general method of risk assessment for flammable working fluid leakage.
For Ms. Souhail, the suspension was a major success, as was establishing the quota for women in Parliament.
