Generated Narrative: ValueSet ssf-4-neck-valueset Include all codes defined in https://hapi.fhir.tw/fhir/CodeSystem/ssf-4-neck-codesystem
SSF4 頭頸癌-頸部第 IV-V 區及後咽區淋巴結侵犯範圍值集
Levels IV-V and Retropharyngeal Lymph Nodes for Head and Neck Value Set