preferred_name: Sentinel node biopsy and code 3, 4, or 5 at different times
preferred_name_lc: sentinel node biopsy and code 3, 4, or 5 at different times
label: Sentinel node biopsy and code 3, 4, or 5 at different times
label_lc: sentinel node biopsy and code 3, 4, or 5 at different times