Received: 24 March 2020
Accepted: 11 June 2020
First Online: 22 July 2020
Ethics approval and consent to participate
: The protocol of study was approved by the institutional review board and in accordance with the stipulations of the local ethical and scientific committees of Ain-Shams University Hospitals, Faculty of medicine (reference number of the ethical committee FWA000017585), and the procedures respected the ethical standards in the Helsinki declaration of 1964. Written informed consents were obtained from patients to use their samples in this study.
: Not applicable
: The authors declare that they have no competing interests.