Key-value codes for health care areas.
Kungalv is an independent area by default. There are situations when Kungalv should be dealt with as an independent health care region or as a part of greater Gothenburg. See section "extra_functions" in decode to handle this.
Key: the first four digits from the LKF-code
Value: A geographical area (sub area of county/lan) with special interest
The object currently only applies to the Western health care region
Storgoteborg
Fyrbodal
Sodra_Alvsborg
Skaraborg
Norra_Halland
Updates for other regions needs to be requested (please do!).
Other key_value_data: 
atc,
distrikt,
figo,
forsamling,
hemort,
hsn,
icd10cm,
icd10se,
icd7_grov,
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,
snomed3,
snomed,
t_rtr,
tnmgrund