Text and Data Mining valid from 2018-11-21
Received: 6 April 2018
Accepted: 16 October 2018
First Online: 21 November 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee at each participating center. The protocol has reached version 6, in which there were no changes. Relevant amendments to the protocol will be submitted to the ethics committee for further approval, as warranted. Written informed consent to the study will be obtained from the patients, patients’ next of kin, or other surrogate decision makers where appropriate. A trained investigator is collecting the informed consent documents at each site.
: The written informed consent for the analysis and publication of anonymized data will be obtained from the patients, patients’ next of kin, or other surrogate decision makers, where appropriate.
: The authors declare that they have no competing interests.
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