{
    "id": "IAM.12",
    "type": "Field",
    "position": "IAM.12",
    "name": "Onset Date Text",
    "length": 60,
    "usage": "O",
    "rpt": "1",
    "dataType": "ST",
    "dataTypeName": "String Data",
    "tableId": null,
    "tableName": null,
    "description": "This field contains a text description of the time period of the first reaction when an exact date is not known. (e.g., adolescence, childhood, spring 1990).",
    "sample": "",
    "fields": []
}