The phrase "are further divided according" is correct and usable in written English.
It can be used when explaining how something is categorized or classified based on specific criteria.
Example: "The species are further divided according to their habitat preferences."
Alternatives: "are additionally categorized based on" or "are subdivided according to".
Within each category, models are further divided according to the reactor type or physical process which they are examining.
Within successful cases, drugs are further divided according to whether they were approved at their time of repositioning.
Fragile sites are classified as common or rare, depending on their frequency in the population, and are further divided according to their mode of induction in cultured cells.
These groups are further divided according to the presence of joint incongruence, varus/valgus, loss of height, translation of bones and luxation.
Most classes are further divided according to different distinct phenotypic data sources used (GRIN for international, Emilia-Romagna, CRA and Ente Nazionale Risi evaluation data for Italian germplasm collections).
The complete list of the genes discussed in the text is in part B of Additional file 7, ordered by GO functional category; for clarity, they are further divided according to more specific GO metabolisms, when possible.
The is further divided according to the unit label.
Then this classification is further divided according to the interlacing angle of the structure.
Each group of patients with either monomicrobial or polymicrobial infection was further divided according to the outcomes into categories with or without infection recurrence.
The F2 population category is further divided according to the number of individuals comprising each population (<1,000 individuals vs ≥1,000 individuals) because these two categories are often used for different objectives.
All of the descriptors were classified into two broad categories of cognitive abilities (which were further divided according to the function that each descriptor conveyed) and reading strategies and into hypothetically nine CSE levels (ranging from A1 to C3) defined on the basis of learning stages in the nation for the convenience of data collection.
