Article History
Received: 1 July 2017
Accepted: 6 September 2017
First Online: 15 November 2017
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the ethical committee of the Palestinian health research council (PHRC) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
: Samples and data were collected after approval of Ard El Insan Palestinian Benevolent Association and consent of the patients and controls or their parents. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.