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Gadget Usage and Its Relationship with Mental and Emotional Health in Early Childhood (3–6 Years) at Puskesmas Medan Tuntungan. Sumat. Med. J. [Internet]. 2026 Jan. 1 [cited 2026 Feb. 4];9(1):11-7. Available from: https://idjpcr.usu.ac.id/smj/article/view/22796