Text and Data Mining valid from 2018-08-06
Received: 16 October 2017
Accepted: 30 July 2018
First Online: 6 August 2018
Ethics approval and consent to participate
: Parents gave verbal informed consent to telephone interviews, data collection and publication of study results. The study was approved by the local Ethics Committee (Charité, Berlin, Germany, EA2/190/17). Verbal consent was approved since no interventions appart from routine clinical care were performed and data were collected retrospectively from clinical charts.
: The authors declare no competing interests.
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