Text and Data Mining valid from 2018-10-04
Received: 20 August 2018
Revised: 25 September 2018
Accepted: 27 September 2018
First Online: 4 October 2018
Compliance with ethical standards
: This study was conducted according to the principles of the declaration of Helsinki. The ethics approval (2016/17/I/LR11IPT05) was obtained from the institutional review board of Pasteur Institute (Tunis- Tunisia- Registration number IRB00005445, FWA00010074).
: The authors declare that they have no conflict of interest.
: Written informed consent was obtained from the family members or their guardians for being included in the study.