Efficacy of low-level laser therapy in pain relief during orthodontic treatment: Protocol for a systematic review and meta-analysis - Cintia Ronchi Lemos; Daniela Bianchini Orlandi; Anna Carolina Pereira Thimoteo; Helena Polmann; Patrícia Pauletto; Cristine Miron Stefani; Eliete Neves Silva Guerra; Carlos Flores-Mir; Graziela De Luca Canto (PLoS ONE, 2026)