Materials needed:
Mesenchymal stromal stem cells, trypsin solution (Biochrome), magnetic rack for 15 ml tubes (Genekam), CD90 magnetic beads (MICROBOSS Nanomedicine GmbH), sterile PBS, Dulbecco's Modified Eagle Medium (DMEM; Biochrome), sterile 15 ml tubes, cell culture plates or flasks, centrifuge, pipettor and sterile Pipette tips, MSC cell culture media and CO2 incubator.