http://hl7.org/fhir/StructureDefinition/observation-precondition|4.0.1
Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the [Observation notes](observation.html#notes) section for additional guidance.
| Name | Flags | Card | Type | Description & Constraints |
|---|---|---|---|---|
Extension | 0..* | Other Observations needed to aid in the interpretation of the source observation. | ||
| ?..0 | ||||
| ?..? | ||||
| 1..? | ||||
| 1..? | Reference |