The phrase "are three subtypes of" is correct and usable in written English.
It can be used when discussing categories or classifications within a particular subject or field.
Example: "In the study of mammals, there are three subtypes of primates: prosimians, monkeys, and apes."
Alternatives: "include three categories of" or "consist of three types of".
Gene expression profiling (GEP) suggests there are three subtypes of muscle-invasive urothelial cancer (UC): basal, which has the worst prognosis; p53-like; and luminal.
Gangs (Supporters): "According to the National Gang Intelligence Center (NGIC), there are three subtypes of gangs: street gangs, prison gangs, and outlaw motorcycle gangs.
Gangs in the United States (Supporters): "According to the National Gang Intelligence Center (NGIC), there are three subtypes of gangs: street gangs, prison gangs, and outlaw motorcycle gangs of these three groups, street gangs most often engage in and profit from IP theft, therefore this analysis focuses exclusively on this subtype".
There are three subtypes of Castleman, and he has the most deadly form.
There are three subtypes of ADHD: the inattentive type, the hyperactive/impulsive type, and the combined type.
There are three subtypes of sodium-dependent CNTs (CNT1 3) in the SLC28 family.
There are two subtypes of MDSCs, granulocytic and monocytic43,44,45.
There are two subtypes of angiotensin (Ang) II receptors, AT1R and AT2R.
There are eight subtypes of frontotemporal degeneration, sorted by the symptoms they cause.
There are five subtypes of mAChR, M1 - M5, which are expressed throughout the central nervous system (CNS) on numerous cell types and represent promising treatment targets for a number of different diseases, disorders, and conditions of the CNS.
NSCLC, which accounts for 75% of all lung cancers, and small cell lung cancer (SCLC) are two subtypes of lung cancer that share distinct histological and genetic signatures.
