preferred_name: No proper value is applicable in this context (e.g., no other treatment administered; autopsy only case).
preferred_name_lc: no proper value is applicable in this context (e.g., no other treatment administered; autopsy only case).
label: No proper value is applicable in this context (e.g., no other treatment administered; autopsy only case).
label_lc: no proper value is applicable in this context (e.g., no other treatment administered; autopsy only case).