Received: 23 May 2019
Accepted: 16 July 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: The study was approved by the “Scientific and Ethical Committee” of SCH in December 2014. Informed written consent to participate in the study was provided by all participants.
: Not applicable as no identifiable information was present.
: The authors declare that they have no competing interests.