Experiences, outcomes and unmet needs of caregivers of children with Cerebral Palsy in Spain: Protocol for a mixed-methods study - Clàudia Arumí-Trujillo; Francisco José Verdejo-Amengual; Oriol Martínez-Navarro; Jord J.T. Vink; Fran Valenzuela-Pascual (PLoS ONE, 2026)