Effects of a level-based immersive virtual reality physical therapy program on static and dynamic balance in Parkinson’s disease: Protocol for a randomized controlled trial - Lorena Morcillo-Martínez; María Sanz-Mármol; Adriana Isabel Romanos-Navarrete; Sandra Calvo; Lilian Le Roux-Ethève; Laura Esteban-Repiso; Paula Córdova-Alegre; Carolina Jiménez-Sánchez; Aitor Garay-Sánchez; Natalia Brandín-de la Cruz (PLoS ONE, 2026)