The phrase "a unique population of" is correct and usable in written English.
It can be used when referring to a specific group of individuals or entities that possess distinct characteristics or qualities that set them apart from others.
Example: "The researchers studied a unique population of migratory birds that exhibit unusual nesting behaviors."
Alternatives: "a distinct group of" or "a special cohort of".
But the island did once have a unique population of pygmy elephants (true) and you can still see more species of birds year-round than on any other island in the Mediterranean (probably).
The elderly are a unique population of patients.
India also has a unique population of undertreated HIV disease, and they seem to have much lower CD4 counts.
However, optimal treatment for those with the clinical diagnosis of central cord syndrome (CCS) is less clear, and classic definitions of CCS do not identify a unique population of patients.
Several studies have described a unique population of macrophages with properties of both inflammatory (M1) and tissue remodeling/fibrotic (M2) macrophages, termed scar-associated macrophages, arising from recruited Ly6Chi monocytes expressing high levels of MMP13 that mediate regression of liver fibrosis in animal models [86,131-136].
They also support endothelial cell survival and release TGF-β that triggers transdifferentiation of fibroblasts to activated myofibroblasts [72,73], a unique population of mesenchymal cells that display increased production of fibrillar type I and type III collagens, expression of α-smooth muscle actin (α-SMA) and a reduction in the expression of ECM degradative enzymes such as the MMPs [105-114].
The macrophage phenotype during this stage remains unclear with some studies in the liver suggesting the existence of a unique population of fibrinolytic scar-associated macrophages required for fibrosis resolution [86,133-136], althothersthave have reported these macrophages to be profibrotic [137,138].
"Our studies focused on a unique population of immune cells (cells that constitute our body's defenses against infection), quiescent CD4 T cells, which can be targeted by HIV but are resistant to the virus," lead researcher Dr. Dimitrios Vatakis, co-director of UCLA's CFAR Virology Core Laboratory, told The Huffington Post in an email.
These data support the notion that SCAP are a unique population of postnatal stem cells.
