Request medication where there is an option of the route of administration - includes group identifier

{
  "resourceType" : "MedicationRequest",
  "id" : "medrx0343b",
  "contained" : [{
    "resourceType" : "Medication",
    "id" : "med0343b",
    "code" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "782032003",
        "display" : "Product containing precisely ondansetron (as ondansetron hydrochloride) 2 milligram/1 milliliter conventional release solution for injection (clinical drug)"
      }]
    }
  }],
  "identifier" : [{
    "use" : "official",
    "system" : "http://www.bmc.nl/portal/prescriptions",
    "value" : "98765"
  }],
  "groupIdentifier" : {
    "use" : "official",
    "system" : "http://www.bmc.nl/portal/prescriptions",
    "value" : "9898"
  },
  "status" : "active",
  "intent" : "option",
  "medication" : {
    "reference" : {
      "reference" : "#med0343b",
      "display" : "Ondansetron 2mg/ml Injection"
    }
  },
  "subject" : {
    "reference" : "Patient/pat1",
    "display" : "Donald Duck"
  },
  "authoredOn" : "2015-01-15",
  "requester" : {
    "reference" : "Practitioner/f007",
    "display" : "Patrick Pump"
  },
  "dosageInstruction" : [{
    "sequence" : 1,
    "text" : "4mg IM twice daily as needed for nausea",
    "timing" : {
      "repeat" : {
        "frequency" : 2,
        "period" : 1,
        "periodUnit" : "d"
      }
    },
    "asNeededFor" : [{
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "16932000",
        "display" : "Nausea and Vomiting"
      }]
    }],
    "route" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "78421000",
        "display" : "Intramuscular Route"
      }]
    },
    "doseAndRate" : [{
      "doseQuantity" : {
        "value" : 4,
        "unit" : "mg",
        "system" : "http://unitsofmeasure.org",
        "code" : "mg"
      }
    }]
  }]
}