attributes.tag: source_name
attributes.value: cardiac biopsy
attributes.tag: tissue
attributes.value: cardiac biopsy
attributes.tag: patient age
attributes.value: 1-2 weeks
attributes.tag: cell type
attributes.value: c-kit+ cardiac-derived stromal cells
attributes.tag: patient congenital_heart_disease
attributes.value: atrial septal defect, ventricle septal defect, coarctation
attributes.tag: passage
attributes.value: 12