The following examples use the ® html entity:

• Procedure-defib-implant.json
• Encounter-example-1.json

Per https://www.hl7.org/fhir/narrative.html#2.4.0 that is not allowed in narrative text.

> Note that the XHTML is contained in general XML so there is no support for HTML entities like   or © etc. Unicode characters SHALL be used instead. Unicode   substitutes for  .