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Article History

Received: 2 November 2016

Accepted: 29 January 2018

First Online: 9 February 2018

Ethics approval and consent to participate

: Ethical approval for this study was obtained from the Standard Committee for Research Ethics on Living Creatures (SCRELC) at Imam Abdulrahman Bin Faisal University (IRB approval number IRB-2013-01-006). On the other hand, Informed patient consent was waived by the SCRELC due to the use of archival material of anonymous nature that doesn’t disclose patients identity and because patients are lost to follow-up.

: Not applicable.

: The authors declare that they have no competing interests.

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