The phrase "a special subgroup" is correct and usable in written English.
It can be used when referring to a distinct or unique subset within a larger group, often in contexts like research, social sciences, or organizational structures.
Example: "In our study, we focused on a special subgroup of participants who exhibited unique behavioral patterns."
Alternatives: "a distinct subgroup" or "a unique subset".
In particular, further work is needed regarding the BRICS member nations, a special subgroup composed of Brazil, Russia, India, China, and South Africa.
Of note, nine of the 21 lowland japonica landraces clustered together, suggesting a special subgroup of Kalimantan japonica landraces that have been adapted to irrigated conditions (Fig. 4).
In addition, it has to be mentioned that our sample provides a special subgroup of the general population and even of CAD patients.
Homicidal adolescents with psychopathy-like personality character form a special subgroup among other homicidal youngsters.
A CDP subject is therefore a special subgroup of the CAP deaths.
As demonstrated in several sections of this study, old people compose a special subgroup among returnees.
In order to discover special classes, we conducted a series of two-means clustering experiments of the positive observations, but they did not reveal the existence of any special subgroups of observations.
Previous stem cell research identified a Twist-promoted process known as epithelial-to-mesenchymal transition, or EMT, as an important marker denoting the special subgroup of breast cancer stem cells.
Instead of stories for girls, or the sons of feminists, stories like these need to be part of a mainstream narrative, not a special, separate, subgroup.
In the P. aeruginosa branch, strains life-styles and hosts are mixed, supporting the view that at the overall genomic level, human pathogenic strains are not a special structured subgroup within P. aeruginosa.
Recommendations for the harmonization of orphan drug development in LA with that of developed nations include adopting the EU definition of rare disease, instituting incentives for industry, and establishing a special technical subgroup for rare diseases that considers the unique challenges of rare diseases, among other techniques.
