Kiani, Behnaz
Hadianfard, Habib
Mitchell, John T.
Article History
Received: 23 May 2018
Accepted: 31 January 2019
First Online: 9 February 2019
Compliance with ethical standards
: The study was performed in accordance with the ethical standards.
: The authors declare that they have no conflict of interest.
: The parents of the children approved and signed the informed consent form.