The phrase "all of which concern" is correct and usable in written English.
It can be used to refer to multiple items or subjects that are related to a specific topic or issue.
Example: "The reports cover various aspects of the project, all of which concern the budget and timeline."
Alternatives: "all of which relate to" or "all of which pertain to".
Tarah's earliest memories are dreams she had when she was very young, all of which concern her brothers.
Thus, in addition to the discussion about human germ line editing, CRISPR raises or revives many other ethical issues, not all of which concern only humans, but also other species and the environment.
Even when Faulkner's influence isn't overt, Glave reveals, in stories like "The Pit," "A Real Place" and "Their Story," all of which concern the Caribbean, a tendency to let rhetorical frenzy substitute for thematic investigation.
Donald Trump's withdrawal from the Paris climate agreement, announced officially on Thursday, will have many negative consequences, not all of which concern CO2 pollution.
It contains only five questions, all of which concern almost equally difficult functions.
Brexit could entail the renegotiation of thousands of exceedingly complex E.U. regulations, many of which concern the food system.
New York's financial crisis has spawned some absurd theories, the silliest of which concern our sex lives.
I study optical properties of nanoparticles and photonic crystals, both of which concern the behavior of light in structures with nanometer length scale.
Experts draw on maritime and air law, both of which concern international questions of jurisdiction, but the examples do not go far enough.
She was featured in The Best Exotic Marigold Hotel (2011) and its 2015 sequel, both of which concern the comic hijinks of a group of British retirees in India.
But he said he will do so only if members agree to a list of conditions, most of which concern the functioning of the caucus.
