Causal Analysis Is Needed to Evaluate Cardiorespiratory Interaction Alterations in Postural Orthostatic Tachycardia Syndrome Patients. - Beatrice Cairo; Beatrice De Maria; Vlasta Bari; Francesca Gelpi; Maura Minonzio; Franca Barbic; Laura Adelaide Dalla Vecchia; Raffaello Furlan; Alberto Porta (CinC, 2021)