Received: 20 May 2019
Accepted: 9 July 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: Our retrospective non-interventional non-invasive study was done after approval and informed oral consent of all patients or their relatives and all personal patients’ data are hidden carefully.The consent was oral because the study was retrospective non-interventional, we just looked into the papers. Bringing the patients or their relatives while most of them are living in faraway provinces for a written consent would be really difficult.The study protocol was approved by the Critical Care Department; Faculty of Medicine Cairo University Ethical Committee followed by the approval of the Faculty of Medicine Kasr Al-Ainy College Council; Cairo University, Egypt.
: Not applicable
: The authors disclose there is no conflict of interests.