MedicationRequest.dose.dosageInstruction :

	...
	"text": "1800 mg (1000 mg/m2) orally twice daily from days 1-14 of cycle",
	...
	"doseAndRate": [
		{
			"type": {
				"coding": [
					{
						"system": "http://terminology.hl7.org/CodeSystem/dose-rate-type",
						"code": "calculated",
						"display": "Calculated"
					}
				]
			},
			"doseQuantity": {
				"value": 1000,
				"unit": "mg/m2",
				"system": "http://unitsofmeasure.org",
				"code": "mg/m2"
			}
		},
		{
			"type": {
				"coding": [
					{
						"system": "http://terminology.hl7.org/CodeSystem/dose-rate-type",
						"code": "ordered",
						"display": "Ordered"
					}
				]
			},
			"doseQuantity": {
				"value": 1800,
				"unit": "mg",
				"system": "http://unitsofmeasure.org",
				"code": "mg"
			}
		}
	]