TY - RPRT TI - "Clumpogenic" v clonogenic assay. AU - G Umbach AU - G Spitzer AU - B Drewinko PY - 1983 DO - 10.1016/s0140-6736(83)90714-6 UR - https://pubmed.ncbi.nlm.nih.gov/6136778/ ID - 6136778 ER -