[1] Univ Southampton, Ctr Human Dev Stem Cells & Regenerat, Bone & Joint Reseach Grp, Southampton, Hants, England
[2] Univ Nottingham, Wolfson Ctr Stem Cells Tissue Engn & Modelling ST, Nottingham NG7 2RD, England
[3] Univ London Imperial Coll Sci Technol & Med, Dept Bioengn, Dept Mat, London, England
[4] Univ London Imperial Coll Sci Technol & Med, Inst Biomed Engn, London, England