Received: 24 February 2019
Accepted: 14 June 2019
First Online: 21 June 2019
Availability of data and materials
: All data generated or analysed during this study are included in this published article.
: All participants signed a written consent. The study has been approved by the ethics committee for biomedical research of the MOHAMED V Faculty of Medicine and Pharmacy in RABAT (N/R: Folder Number 15/18).
: Not applicable.
: The authors declare that they have no competing interests.