1. Tissue Engineering Group, Department of Histology, School of Medicine, University of Granada, Granada, Spain.
2. ibs.GRANADA, Biohealth Institute, Granada, Spain.
3. Division of Pediatric Surgery, University of Granada Hospital Complex, Granada, Spain.
4. Department of Human Anatomy and Embryology, School of Medicine, University of Granada, Granada, Spain.
5. Department of Dentistry, School of Dentistry, University of Utah, Salt Lake City, Utah, USA.