Success rate of endodontic treatment of teeth with vital and nonvital pulps. A meta-analysis. - Kojima,K.; Inamoto,K.; Nagamatsu,K.; Hara,A.; Nakata,K.; Morita,I.; Nakagaki,H.; Nakamura,H. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2004)