Brazilian organic propolis for prevention and treatment of radiation-related oral acute toxicities in head and neck cancer patients: a double-blind randomized clinical trial - Fernandes, Patrícia Maria; Rosalen, Pedro Luiz; Fernandes, Diego Tetzner; Dias-Neto, Emmanuel; Alencar, Severino Matias; Bueno-Silva, Bruno; Alves, Fábio de Abreu; Lopes, Márcio Ajudarte (Frontiers in Pharmacology, 2022)