Received: 11 September 2017
Accepted: 13 May 2018
First Online: 29 May 2018
Ethics approval and consent to participate
: The study was approved by the ethics committees for scientific research of the La Rabta Hospital Tunis, Tunisia; no reference number was issued.
: Written informed consent for publication of their clinical details and/or clinical images was obtained from the parents of each patient. Copies of the consent forms are available for review by the Editor of this journal.
: The authors declare that they have no competing interests.
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