1. Department of Oral & Maxillofacial‐Head & Neck Oncology College of Stomatoloy Shanghai Jiao Tong University School of Medicine National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology & Shanghai Key Research Institute of Stomatology Ninth People’s Hospital Shanghai China
2. Department of Oral and Maxillofacial Surgery College of Medicine University of Ibadan Ibadan Nigeria