1. I.M. Borovsky Institute of Dentistry, I.M. Sechenov First Moscow State Medical University, Moscow 119991, Russia
2. School of Stomatology, Anhui Medical University, Hefei, 230032 Anhui, China
3. Linyi People’s Hospital Department of Oral and Maxillofacial Surgery, Linyi, 276003 Shandong, China