Appointment between 2 doctors to discuss MRI results

{
  "resourceType" : "Appointment",
  "id" : "2docs",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">Brian MRI results discussion</div>"
  },
  "status" : "booked",
  "serviceCategory" : [{
    "coding" : [{
      "system" : "http://example.org/service-category",
      "code" : "gp",
      "display" : "General Practice"
    }]
  }],
  "serviceType" : [{
    "concept" : {
      "coding" : [{
        "code" : "52",
        "display" : "General Discussion"
      }]
    }
  }],
  "specialty" : [{
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "394814009",
      "display" : "General practice"
    }]
  }],
  "appointmentType" : {
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/v2-0276",
      "code" : "WALKIN",
      "display" : "A previously unscheduled walk-in visit"
    }]
  },
  "description" : "Discussion about Peter Chalmers MRI results",
  "supportingInformation" : [{
    "reference" : "DiagnosticReport/ultrasound"
  }],
  "start" : "2013-12-09T09:00:00Z",
  "end" : "2013-12-09T11:00:00Z",
  "note" : [{
    "text" : "Clarify the results of the MRI to ensure context of test was correct"
  }],
  "subject" : {
    "reference" : "Patient/example",
    "display" : "Peter James Chalmers"
  },
  "participant" : [{
    "actor" : {
      "reference" : "Practitioner/example",
      "display" : "Dr Adam Careful"
    },
    "required" : true,
    "status" : "accepted"
  },
  {
    "actor" : {
      "reference" : "Practitioner/f202",
      "display" : "Luigi Maas"
    },
    "required" : true,
    "status" : "accepted"
  }]
}