The phrase "are exclusively done" is correct and usable in written English.
It can be used to indicate that certain actions or tasks are performed solely in a specific manner or by a specific group.
Example: "The experiments in this study are exclusively done using advanced technology to ensure accuracy."
Alternatives: "are solely performed" or "are only carried out".
Although the latest documents are part of an NSA haul leaked by Snowden, it is not clear in each case whether the surveillance was being exclusively done by the NSA – which is most probable as the embassies and missions are technically overseas – or by the FBI or the CIA, or a combination of them.
However, the major limitation of the Zinnia elegans system is that the initiation of xylogenic cultures is exclusively done from freshly isolated mesophyll.
He felt the move was exclusively done to make a splash on the national level.
Moreover, identification of DD is exclusively done by health care professionals with little or no involvement of parents or caregivers.
The analysis was exclusively done on candidates for antiviral treatment, and thus was limited to those infected with HCV genotype 1, who are difficult to treat and account for a large portion of CHC patients in Japan.
Favela kids were exclusively doing the hip hop thing until a few years ago, but since our economy blew up, there are enough cheaper options available to them that they can escape the "poor kid into rap" look and try out some others.
Collection and especially analysis of open-ended survey responses are relatively rare in the discipline and when conducted are almost exclusively done through human coding.
Commercial production of acarbose is exclusively via done microbial fermentation with strains from the genera of Actinoplanes.
However, in vitro drug testing is almost exclusively done in well stirred, homogeneous environments.
While initial investigations into the optical properties of plasmonic systems have been almost exclusively done with metallic nanostructures on 'passive' dielectric substrates, such as silica or quartz, the real-world applications in many cases require the use of semiconductor substrates.
