1 Institute of Cell and Tissue Culture Technologies, Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria.
2 Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen Nuremberg, Erlangen, Germany.
3 Diabetes Research Institute & Cell Transplantation Center, University of Miami, Miller School of Medicine, Miami, FL, United States.
4 Tissue Engineering Research Group (TERG) & AMBER Centre Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), Dublin, Ireland.