Effects of Transcutaneous Vagus Nerve Stimulation on Gastrointestinal Symptoms and Cardiovascular Autonomic Outcomes: A Systematic Review and Meta-Analysis. - Pérez-Montalbán, María; García-Domínguez, Encarna; Pabón-Carrasco, Manuel; Oliva-Pascual-Vaca, Ángel (Neurology International, 2026)