FHIR Scaling to a Nation

Most discussions about FHIR are simple interaction diagrams like this:Many Sources (n != 1)The Real story needs to consider that the "Source" above is a single box representing 10,000 potential source systems that hold data about the patient: (map is a static view of CareQuality network)More important is that the above map only represents Clinical sources. There are also Payer sources, and many more...So there is a real scale problem with the above.If we look at the use-case of Treatment...