attributes.tag: source_name
attributes.value: primary human umbilical vein endothelial cells, undifferentiated (passage 4 or less)
attributes.tag: cell type
attributes.value: primary human umbilical vein endothelial cells, undifferentiated (passage 4 or less)
attributes.tag: genotype
attributes.value: FLT4_WT
attributes.tag: geo_loc_name
attributes.value: missing
attributes.tag: collection_date
attributes.value: missing