| id | No | string | Unique id for inter-element referencing |
| extension | No | Extension[] | Additional content defined by implementations |
| modifierExtension | No | Extension[] | Extensions that cannot be ignored even if unrecognized |
| age[x] | No | Range, CodeableConcept | The age of the specific population |
| gender | No | CodeableConcept | The gender of the specific population |
| race | No | CodeableConcept | Race of the specific population |
| physiologicalCondition | No | CodeableConcept | The existing physiological conditions of the specific population to which this applies |
