Ethical Considerations
This study has been reviewed and approved by the Institutional Review Board of the Jordan University of Science and Technology (JUST) (Reference# 14/112/2017, date 14/1/2018). Also, the project proposal has been endorsed by the Minister of Health in Jordan, UNICEF-Jordan and we obtained the security clearance from the office of the United Nations High Commissioner for Refugees (UNIHCR) that has the full mandate of protecting the Zaatari camp. Due to the vulnerability of the refugees and the context of the camp, all participants were invited to participate on a voluntary basis. Survey data was collected, at baseline, and follow-up visits dates were recorded using study ID numbers. No personal information was stored. The study participants had their full right to cancel their participation in the study, including closing their study file, at any time during the study period.