Received: 13 November 2018
Accepted: 31 May 2019
First Online: 17 July 2019
Change Date: 9 August 2019
Change Type: Correction
Change Details: The original article  contained a minor typo in Fig. 1 affecting the motif ‘VSS-SF-CK’; this has since been corrected.
Ethics approval and consent to participate
: Approval (number 43C) was granted from the ethical committee of the College of medicine/University of Sulaimani, Iraq. The work was implemented in accordance with international guidelines and 2008 Declaration of Helsinki. Written informed consents were provided by participants.
: Not applicable.
: The authors declare that they have no competing interests.