Funding for this research was provided by:
National Research Centre (10010322)
Received: 30 June 2018
Accepted: 13 February 2019
First Online: 4 March 2019
Ethics approval and consent to participate
: Informed consent was obtained from all subjects and the study protocol was approved by the Ethics Committee of the National Research Centre.
: Not applicable.
: The authors declare that they have no competing interests.
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