1 School of Stomatology, Weifang Medical University, Weifang 261053, Shandong, China.
2 Department of Stomatology, Weifang People's Hospital, First Affiliated Hospital of Weifang Medical University, Weifang 261053, Shandong, China.
3 School of Stomatology, Weifang Medical University, Weifang 261053, Shandong, China;Department of Dentistry, Affiliated Hospital of Weifang Medical University, Weifang 261035, Shandong, China.