Received: 28 December 2019
Accepted: 17 March 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: The study was approved by the ethical committee of the Faculty of Medicine, Zagazig University. The date of the approval of the protocol was December 2017 from the Department of Radiology, Faculty of Medicine, Zagazig University. The committee has no reference number, only the date.
: The local ethics committee of our institution ruled that the informed consent from the legal guardian was not needed as this is a retrospective study and all patients’ medical information were hidden.
: Thw authors declare that they have no competing interests.