Vera-Serrano, F. J., Vinolo-Gil, M. J., Rebollo-Ramos, M., Estebanez-Pérez, M., Pastora-Bernal, J., Díaz-Mancha, J. A. (2026). Baseline associations between thoracic expansion, respiratory function, and pain in nonspecific low back pain: A cross-sectional analysis from the DIAFRAGMA trial. PLoS ONE. https://doi.org/10.1371/journal.pone.0346124