TY - RPRT TI - Multistep and multifactorial carcinogenesis: when does a contributing factor become a carcinogen? AU - Michele Carbone AU - Harvey I Pass PY - 2004 DO - 10.1016/j.semcancer.2004.06.002 UR - https://pubmed.ncbi.nlm.nih.gov/15489132/ ID - 15489132 ER -