Comparison of autonomic responses to the tilt table test between patients with postural orthostatic tachycardia syndrome and healthy individuals: a study matched for sex and age. Revista Brasileira de Iniciação Científica. Published online September 15, 2026:e026026. Accessed October 29, 2026. https://periodicoscientificos.itp.ifsp.edu.br/index.php/rbic/article/view/2779