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Je-Young Yon, Gyung-Joon Chae, Ui-Won Jung, Chang-Sung Kim, Seong-Ho Choi, Kyoo-Sung Cho, Chong-Kwan Kim, Jung-Kiu Chai. "Long-term evaluation of implant placed in sites grafed by lateral window approach on maxillary sinus; a 10-year retrospective study." The Journal of the Korean Academy of Periodontology 37.4 (2007) 691