Evaluating the Effectiveness of a Digital mHealth Intervention (Bei App) to Support Multimodal Treatment in Patients with Fibromyalgia: A Randomized Controlled Trial Protocol - Silvia Di?Bonaventura; Ferrer-Peña Raúl; Francisco Gurdiel?Álvarez; Mercado Francisco; Fierro-Marrero José; David Morales Tejera; Víctor Riquelme-Aguado; Kevin Pacheco?Barrios (medRxiv, 2025)