Received: 17 November 2017
Accepted: 10 September 2018
First Online: 10 October 2018
Compliance with ethical standards
: The study was approved by an Investigational Review Board of the Faculty of Medicine, Tanta University; an informed written consent was obtained from all patients participating in the study. This study was registered in the clinical trials registry (ExternalRef removed) with a unique identification number NCT02382653.
: The authors declare that they have no conflict of interest.