Received: 1 April 2019
Accepted: 20 September 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: This study was approved by the IPOLFG Ethical Board Committee, (committee’s reference number: UIC/1203). Study design and conduction of the study were performed accordingly to high standards of ethics. Written informed consent was obtained prior to any data acquisition, sample collection, or data analysis from the participants.
: Not applicable.
: The authors declare that they have no competing interests.