Figure 1 Identification of circulating mesenchymal cells (cMSCs) by flow cytometry. Peripheral blood samples were stained with monoclonal antibodies as described in the text. A gate containing medium‐high forward and side scatter non‐haematopoietic cells was drawn (R1, left). cMSCs were defined as positive for the markers CD29 and CD13, within region R1 (right).