organism: Homo sapiens
attributes.tag: source_name
attributes.value: primary tumor
attributes.tag: source
attributes.value: perineural invasion
attributes.tag: disease
attributes.value: human pancreatic ductal adenocarcinoma (PDAC)
attributes.tag: tissue
attributes.value: primary tumor
attributes.tag: tumor
attributes.value: outside
attributes.tag: distance from perineurium
attributes.value: 3
attributes.tag: geo_loc_name
attributes.value: missing
attributes.tag: collection_date
attributes.value: missing