preferred_name: Hearing loss, progressive, (high frequency loss at first progressing to loss of all frequencies)
preferred_name_lc: hearing loss, progressive, (high frequency loss at first progressing to loss of all frequencies)
label: Hearing loss, progressive, (high frequency loss at first progressing to loss of all frequencies)
label_lc: hearing loss, progressive, (high frequency loss at first progressing to loss of all frequencies)