Histological characteristics of early-stage oral tongue cancer in young versus older patients: a multicenter matched-pair analysis - Bello, Ibrahim O; Almangush, Alhadi; Heikkinen, Ilkka; Haglund, Caj; Coletta, Ricardo D; Kowalski, Luiz Paulo; Makitie, Antti A; Nieminen, Pentti; Leivo, Ilmo; Salo, Tuula (Oral diseases, 2022)