1. Department of Stomatology and Key Laboratory of Precision Biomedicine (Liaocheng), Liaocheng People's Hospital, Medical College of Liaocheng University, Liaocheng, Shandong 252000, P.R. China
2. Clinical Laboratory, Heze Municipal Hospital, Heze, Shandong 274000, P.R. China
3. Department of Oral and Maxillofacial Surgery, Jinan Stomatological Hospital, Jinan, Shandong 250000, P.R. China