Low body mass index demonstrates satisfactory specificity for diagnosing malnutrition and is associated with longer hospitalization in patients with gastrointestinal or head and neck cancer: a prospective cohort study. - Horn Soares, Camilla; Potrick Stefani, Giovanna; Machado Scott, Laura; Scortegagna Crestani, Mariana; Steemburgo, Thais (Ecancermedicalscience, 2025)