Intensive Outpatient Treatment (also known as IOP for Intensive Outpatient Program) is a primary treatment program recommended in some circumstances by a clinical and medical assessment. IOP may be recommended for those who do not need medically-supervised detox.
The genitive is the case (or function) of an inflected form of a noun or pronoun showing ownership, measurement, association, or source. Adjective: genitival. The suffix -'s on nouns is a marker of genitive case in English. Genitive case can also be indicated by an of phrase after a noun.
An Infinitive Phrase is a group of words consisting of an infinitive and the modifier(s) and/or (pro)noun(s) or noun phrase(s) that function as the actor(s), direct object(s), indirect object(s), or complement(s) of the action or state expressed in the infinitive, such as: We intended to leave early.