Photobiomodulation with low-level laser therapy reduces oral mucositis caused by head and neck radio-chemotherapy: prospective randomized controlled trial - Marín-Conde, F; Castellanos-Cosano, L; Pachón-Ibañez, J; Serrera-Figallo, M A; Gutiérrez-Pérez, J L; Torres-Lagares, D (Int J Oral Maxillofac Implants, 2019)