f:Observation extension with URL = 'https://fhir.athena.io/StructureDefinition/ah-chart-sharing-group': maximum cardinality of 'extension' is 1 extension with URL = 'https://fhir.athena.io/StructureDefinition/ah-practice': minimum cardinality of 'extension' is 1 extension with URL = 'https://fhir.athena.io/StructureDefinition/ah-practice': maximum cardinality of 'extension' is 1 extension with URL = 'https://fhir.athena.io/StructureDefinition/ah-estimated-gestational-age': maximum cardinality of 'extension' is 1 basedOn: maximum cardinality of 'basedOn' is 0 partOf: maximum cardinality of 'partOf' is 0 focus: maximum cardinality of 'focus' is 0 performer: maximum cardinality of 'performer' is 0 bodySite: maximum cardinality of 'bodySite' is 0 method: maximum cardinality of 'method' is 0 specimen: maximum cardinality of 'specimen' is 0 device: maximum cardinality of 'device' is 0 hasMember: maximum cardinality of 'hasMember' is 0 derivedFrom: maximum cardinality of 'derivedFrom' is 0 f:Observation/f:meta id: maximum cardinality of 'id' is 1 versionId: maximum cardinality of 'versionId' is 1 lastUpdated: maximum cardinality of 'lastUpdated' is 1 source: maximum cardinality of 'source' is 1 f:Observation/f:referenceRange low: maximum cardinality of 'low' is 0 high: maximum cardinality of 'high' is 0 type: maximum cardinality of 'type' is 0 appliesTo: maximum cardinality of 'appliesTo' is 0 age: maximum cardinality of 'age' is 0 f:Observation/f:component interpretation: maximum cardinality of 'interpretation' is 0 referenceRange: maximum cardinality of 'referenceRange' is 0