Received: 15 November 2017
Accepted: 21 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of the Sheba Medical Center (approval number SMC 2890-15). The need for informed consent was deemed unnecessary by the committee according to national regulations.
: Not applicable
: The authors declare that they have no competing interests.
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