TY - RPRT TI - Metalloproteinases and malignant conversion: does correlation imply causality? AU - L A Liotta AU - W Stetler-Stevenson PY - 1989 DO - 10.1093/jnci/81.8.556 UR - https://pubmed.ncbi.nlm.nih.gov/2704049/ ID - 2704049 ER -