Correction: Evidence and reality: an observational study on pharmacological outcomes in advanced head and neck tumors - Consuelo Jordán de Luna; Consuelo Jordán de Luna; Anna Esteve; Olalla Montero Pérez; Ana Clopés Estela; Ana Clopés Estela; Marc Oliva; Alicia Lozano Borbalas; Ricard Mesía Nin (Frontiers in Oncology)