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Husain, Akhter; Bronkhorst, Ewald M; Bhat, Hari Kishore; Kuijpers, Mette A R; Koya, Shafees; Kuijpers-Jagtman, Anne Marie (2023). A novel pictorial smile chart: Reliability and validity. American journal of orthodontics and dentofacial orthopedics, 164(2), pp. 215-225. Elsevier 10.1016/j.ajodo.2022.12.012
