[1] Chinese PLA, Dept Stomatol, Med Sch, Beijing 100853, Peoples R China
[2] Chinese Peoples Liberat Army Gen Hosp, Med Ctr 1, Dept Stomatol, Beijing 100853, Peoples R China
[3] CangZhou Stomatol Hosp, Dept Endodont, Cangzhou 061011, Hebei, Peoples R China
[4] New York Presbyterian Columbia Univ Irving Med Ctr, Div Oral & Maxillofacial Surg, New York, NY 11791 USA
[5] New York Presbyterian Columbia Univ Irving Med Ctr, New York, NY 11791 USA
[6] Chinese Peoples Liberat Army Gen Hosp, Dept Stomatol, 28 Fuxing Rd, Beijing 100853, Peoples R China
[7] Chinese PLA Med Sch, 28 Fuxing Rd, Beijing 100853, Peoples R China