1. Center for Regenerative MedicineMassachusetts General Hospital Boston MA USA
2. Department of SurgeryMassachusetts General Hospital Boston MA USA
3. Department of Anesthesiology and Intensive Care MedicineCampus Virchow Klinikum and Campus Charité MitteCharité Universitätsmedizin Berlin Berlin Germany
4. Department of OrthopaedicsMassachusetts General HospitalHarvard Medical School Boston MA USA
5. State Key Laboratory of Oral DiseasesWest China College of StomatologySichuan University Chengdu China
6. Department of BiostatisticsClinical Research UnitCharité Universitätsmedizin Berlin Berlin Germany