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Seehra, Jadbinder; Al-Ali, Anwar; Pandis, Nikolaos; Cobourne, Martyn T (2020). Space closure versus space opening for bilateral absent upper lateral incisors: what is the duration of orthodontic treatment? European journal of orthodontics, 42(4), pp. 460-465. Oxford University Press 10.1093/ejo/cjz062
