preferred_name: A valid date value is provided in item Date of Inpatient Disch [600], or the date was not expected to have been transmitted.
preferred_name_lc: a valid date value is provided in item date of inpatient disch [600], or the date was not expected to have been transmitted.
label: A valid date value is provided in item Date of Inpatient Disch [600], or the date was not expected to have been transmitted.
label_lc: a valid date value is provided in item date of inpatient disch [600], or the date was not expected to have been transmitted.