1. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases; Department of Oral Anatomy and Physiology and TMD; School of Stomatology; The Fourth Military Medical University; Xi'an China
2. College of Automation; Harbin Engineering University; Harbin China
3. Department of Mechanical Engineering; University of Delaware; Newark DE USA