北京大学第三医院口腔科,北京100191;
The Forsyth Institute, Harvard Medical School, Cambridge, Massachusetts 02142, USA;
Division of General Practice and Materials Science, The Ohio State University College of Dentistry, Columbus, Ohio 43210, USA;
北京大学第三医院口腔科,北京100191;
北京大学第三医院口腔科,北京100191;