TY - RPRT TI - Camptothecin induction of a time- and concentration-dependent decrease of topoisomerase I and its implication in camptothecin activity. AU - D R Beidler AU - Y C Cheng PY - 1995 UR - https://pubmed.ncbi.nlm.nih.gov/7538195/ ID - 7538195 ER -