Key-value codes for just the first three digits of the ICDO-7 code.
This gives broader grouping.
See also
Other key_value_data:
atc,
distrikt,
figo,
forsamling,
hemort,
hsn,
icd10,
icd7,
icd9cmd,
icd9,
icdo3_grov,
icdo3,
icdo,
klinik,
kommun,
kon,
kva,
lan,
m_rtr,
n_rtr,
pad,
patologiavdelning,
region,
rockan,
sida,
sjukhus_inca,
sjukhus_par,
sjukhus,
sjukvardsomrade,
snomed3,
snomed,
t_rtr,
tnmgrund