TY - JOUR AU - Folkman, J; Merler, E; Abernathy, C; Williams, G TI - Isolation of a tumor factor responsible for angiogenesis JO - J Exp Med IS - 02 VL - 133 PY - 1971 DO - 10.1084/jem.133.2.275 L3 - PubMed-ID: 4332371 SP - 275 EP - 288 ER -