Esophageal contraction during cryoablation: A possible protective mechanism. - Cai, Dongsheng; Liu, Qiang; Shehata, Michael; Jiang, Ruhong; Yu, Lu; Zhang, Pei; Sun, Yaxun; Chen, Shiquan; Zhang, Zuwen; Fu, Guosheng; Jiang, Chenyang; Wang, Xunzhang (Pacing & Clinical Electrophysiology, 2020)