Funding for this research was provided by:
King Abdulaziz City for Science and Technology (AT 65-34)
King Abdullah International Medical Research Center (RC12/045/R)
Text and Data Mining valid from 2018-03-15
Received: 15 November 2017
Accepted: 7 February 2018
First Online: 15 March 2018
Ethics approval and consent to participate
: The study protocol as well as the informed consent have been approved by the Institutional Review Board of King Abdullah International Medical Research Center, King Abdulaziz Medical City, Riyadh and the respective Institutional Review Boards of all the other centers.
: Not applicable
: The authors declare that they have no competing interests.
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