RT Journal Article SR Electronic T1 Primary bioassay of human tumor stem cells JF Science JO Science FD American Association for the Advancement of Science SP 461 OP 463 DO 10.1126/science.560061 VO 197 IS 4302 A1 Hamburger, AW A1 Salmon, SE YR 1977 UL http://science.sciencemag.org/content/197/4302/461.abstract AB A simple method has been developed to support human tumor stem cell colony growth in soft agar. The technique appears suitable for culture of a variety of neoplasms of differing histopathology. Tumor stem cell colonies arising from different types of cancer have differing growth characteristics and colony morphology. This bioassay should be suitable for clinical studies of effects of anticancer drugs or irradiation on human tumor stem cells.