Text and Data Mining valid from 2019-10-29
Received: 11 April 2019
Accepted: 13 September 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: The study protocol was approved by the ethics board of each hospital where necessary, and written informed consent was obtained from all patients or their legal representatives where appropriate.
: No individual participant data is reported that would require consent to publish from the participant (or legal parent or guardian for children).
: The authors declare that they have no competing interests.