TY - RPRT TI - Stem cell assays: something old, something new, something borrowed. AU - Ronald van Os AU - Leonie M Kamminga AU - Gerald de Haan PY - 2004 DO - 10.1634/stemcells.2004-0095 UR - https://pubmed.ncbi.nlm.nih.gov/15579638/ ID - 15579638 ER -