Received: 19 March 2019
Accepted: 20 September 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: The aim and procedures of the study were explained to all participants and an informed written consent was obtained, while in cases of patients under 16 years, the written consent was taken from their accompanied parent before being included in the study. The study was approved by the Ethical Committee of the National Research Center on 20 December 2016, under registration no. 16465.
: Not applicable
: The authors declare that we have no competing interests (financial and non-financial). We declare that the research was conducted in absence of any commercial relationships that could be of any potential conflict of interest.