Effects on perceived pain and somatosensory function after transcutaneous neuromodulation in patients with chronic low back pain: a quasi-experimental study with a crossover intervention - Selva-Sarzo,F.; Sánchez Romero,E.A.; Cuenca-Zaldívar,J.N.; García-Haba,B.; Akiyama,C.; Sillevis,R.; Fernández-Carnero,S. (Frontiers in Pain Research, 2025)