- Correspondence to Dr Anne Hilgendorff, Department of Neonatology, Perinatal Center Grosshadern, Dr von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich 81377, Germany;
- Received July 20, 2018
- Revised March 28, 2019
- Accepted April 1, 2019
- First published May 2, 2019.
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