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First Online: 29 July 2019

Compliance with Ethical Standards

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: The authors declare that they have no conflict of interest.

: Ethical approval was taken from the institutional review board of National University of Science and technology, Islamabad, Pakistan. Informed consent was taken from the caretaker and school principal of the orphanage setting. Children assent was taken for the participation in the study. All procedures performed in study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.