{"batchcode": "EW991", "histograms": [{"histogram": {"Headache": 2, "Breast pain": 1, "Dizziness": 1, "Laboratory test": 1, "Magnetic resonance imaging head": 1, "Menstruation irregular": 1, "Nausea": 1, "Pain in extremity": 1}, "batchcodes": ["EW991"]}]}