1. Faculty of Biomedical & Life Sciences, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
2. Scottish National Blood Transfusion Service Cell Therapy Group, Royal Infirmary Edinburgh, 51 Little France Cresent, Edinburgh, E16 4SA, UK
3. MRC Centre for Regenerative Medicine, University of Edinburgh, Royal Infirmary Edinburgh, 51 Little France Crescent, Edinburgh E16 4SA, UK