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Article History

Received: 25 October 2018

Accepted: 15 April 2019

First Online: 6 May 2019

Ethics approval and consent to participate

: The study protocol was reviewed and approved by the National Committee for Medical and Health Research Ethics (NEM) (application no. 2017/317). Each participant was informed by the project through an information letter and signed a consent to participate which they handed before recruitment.

: All participants has given their consent for publications in addition to the authors.

: The authors declare that they have no competing interests.

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