Funding for this research was provided by:
EEA Grants (4SEE/30.06.2014)
Text and Data Mining valid from 2019-10-28
Received: 9 August 2019
Accepted: 10 October 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: Ethical approval number: 30884/22.10.2014. The study is performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.