Received: 21 January 2019
Accepted: 9 September 2019
First Online: 29 January 2020
Ethics approval and consent to participate
: The study protocol was approved by Adiyaman University Medical School Ethics Board (approval no:29.01.2015, 57831858/3), and the study was conducted in accordance with the Helsinki declaration. A written informed consent from the participants was given by their parents before the study.
: Not applicable.
: The authors declare that they have no competing interests.