of;
Oral;
Anatomy;
and;
Physiology,;
West;
China;
College;
of;
Stomatology,;
Sichuan;
University,;
Chengdu,;
China;
of;
Stomatology,;
Lanzhou;
University,;
Lanzhou,;
China;
of;
Stomatology,;
Nanjing;
Medical;
Science;
University,;
Nanjing,;
China;