{"batchcode": "EL041", "histograms": [{"batchcodes": ["EL041"], "histogram": {"Headache": 2, "Arthralgia": 1, "Carotid artery dissection": 1, "Dizziness": 1, "Fatigue": 1, "Horner's syndrome": 1, "Magnetic resonance imaging": 1, "Memory impairment": 1, "Nausea": 1, "SARS-CoV-2 test": 1}}]}