“…Sang Ling, PhD 1 Zhanqi Zhao, PhD 2,3 With Electrical Impedance Tomography at Different Days Are Not Comparable To the Editor: W e have read the article from Cardinale et al (1), recently published in Critical Care Medicine. The authors calculated the changes of endexpiratory lung impedance (EELI) measured with electrical impedance tomography (EIT) between consecutive days.…”