1. Department for Oral, Cranio‐Maxillofacial and Facial Plastic Surgery, FORM (Frankfurt Orofacial Regenerative Medicine) LabUniversity Hospital Frankfurt Goethe University Theodor‐Stern‐Kai 7, 60590 Frankfurt am Main Germany
2. Department of Oral and Maxillofacial Plastic and Trauma surgeryCapital Medical University School of Stomatology Beijing China