1. Bone & Joint Research Group, Centre for Human Development, Stem Cells and Regeneration Human Development and Health, Institute of Developmental Sciences, University of Southampton, United Kingdom
2. Department of Endocrinology University Hospital of Odense, Odense, Denmark
3. DanStem Centre, Faculty of Health Sciences University of Copenhagen, Copenhagen, Denmark
4. Stem Cell Unit, Department of Anatomy, College of Medicine King Saud University, Riyadh, Kingdom of Saudi Arabia