National Registry of Diseases Office Singapore Cancer Registry NRCA097 pri_site_icd9 Primary site (converted to ICD-9 codes) refer to ICD-9 manual 1968-2021
National Registry of Diseases Office Singapore Cancer Registry NRCA097 pri_site_icd9 Primary site (converted to ICD-9 codes) refer to ICD-9 manual 1968-2021