PTPRC and Stroke: Since immunomagnetic cell separation enables the rapid and gentle sorting of specific cell types (Paczkowska et al. 2016) it seems possible to aspirate autologous bone marrow, select the CD45–CD34 + CD271 + cells by immunomagnetic separation, and deliver them back to a stroke patient in the form of intravenous or intra-arterial administration of the cells or their secretomes, without the need of prior cell culture.