Received: 9 January 2018
Accepted: 22 April 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: All participants provided written informed consent to participate in the study, in accordance with the ethical standards of the Institution and/or National Research Committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The protocol and the written informed consent were approved by the local ethical committee of each study hospital (Menoufia and Al Azhar University teaching hospitals, Egypt).
: Informed consent was obtained from all the patients. The patient depicted in Figs. InternalRef removed and InternalRef removed gave a written informed consent to publish the images.
: The author(s) declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.