Funding for this research was provided by:
European Centre for Disease Prevention and Control (1 ECD.7550)
Text and Data Mining valid from 2019-09-09
Received: 30 May 2019
Accepted: 15 August 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: The study was approved by the local ethics committee (vote ECS 1053/2018).
: Not applicable.
: The authors declare that they have no competing interests.